Home / 138,932-208,403.76-40,436

Finding the Fourth Proportional to 138,932, 208,403.76 and 40,436

Calculator

Solution

The fourth proportional to 138,932, 208,403.76 and 40,436 is: 60,655.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,932 : 208,403.76 = 40,436 : x
  2. Step 2: Convert to fraction form
    138,932/208,403.76 = 40,436/x
  3. Step 3: Cross multiply
    138,932x = 208,403.76 × 40,436
  4. Step 4: Simplify right side
    138,932x = 8,427,014,439.36
  5. Step 5: Solve for x
    x = 8,427,014,439.36/138,932
  6. Step 6: Final answer
    x = 60,655.68

Related Problems

Find fourth proportional to 69,466, 104,201.88 and 20,218
Half scale
Find fourth proportional to 277,864, 416,807.52 and 80,872
Double scale
Find fourth proportional to 138,933, 208,405.26 and 40,437
Similar ratio
Find fourth proportional to 208,398, 312,605.64 and 60,654
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.