Home / 85,419.17-117,756.66-66,265.15

Finding the Fourth Proportional to 85,419.17, 117,756.66 and 66,265.15

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Solution

The fourth proportional to 85,419.17, 117,756.66 and 66,265.15 is: 91,351.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,419.17 : 117,756.66 = 66,265.15 : x
  2. Step 2: Convert to fraction form
    85,419.17/117,756.66 = 66,265.15/x
  3. Step 3: Cross multiply
    85,419.17x = 117,756.66 × 66,265.15
  4. Step 4: Simplify right side
    85,419.17x = 7,803,162,892.52
  5. Step 5: Solve for x
    x = 7,803,162,892.52/85,419.17
  6. Step 6: Final answer
    x = 91,351.42

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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.