Home / 65,851.10-90,875.09-38,643.47

Finding the Fourth Proportional to 65,851.10, 90,875.09 and 38,643.47

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Solution

The fourth proportional to 65,851.10, 90,875.09 and 38,643.47 is: 53,328.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,851.10 : 90,875.09 = 38,643.47 : x
  2. Step 2: Convert to fraction form
    65,851.10/90,875.09 = 38,643.47/x
  3. Step 3: Cross multiply
    65,851.10x = 90,875.09 × 38,643.47
  4. Step 4: Simplify right side
    65,851.10x = 3,511,729,137.96
  5. Step 5: Solve for x
    x = 3,511,729,137.96/65,851.10
  6. Step 6: Final answer
    x = 53,328.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.