Home / 86,442-129,663-28,074

Finding the Fourth Proportional to 86,442, 129,663 and 28,074

Calculator

Solution

The fourth proportional to 86,442, 129,663 and 28,074 is: 42,111

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,442 : 129,663 = 28,074 : x
  2. Step 2: Convert to fraction form
    86,442/129,663 = 28,074/x
  3. Step 3: Cross multiply
    86,442x = 129,663 × 28,074
  4. Step 4: Simplify right side
    86,442x = 3,640,159,062
  5. Step 5: Solve for x
    x = 3,640,159,062/86,442
  6. Step 6: Final answer
    x = 42,111

Related Problems

Find fourth proportional to 43,221, 64,831.50 and 14,037
Half scale
Find fourth proportional to 172,884, 259,326 and 56,148
Double scale
Find fourth proportional to 86,443, 129,664.50 and 28,075
Similar ratio
Find fourth proportional to 129,663, 194,494.50 and 42,111
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.