Home / 100,864.16-139,145.75-65,065.71

Finding the Fourth Proportional to 100,864.16, 139,145.75 and 65,065.71

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Solution

The fourth proportional to 100,864.16, 139,145.75 and 65,065.71 is: 89,760.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,864.16 : 139,145.75 = 65,065.71 : x
  2. Step 2: Convert to fraction form
    100,864.16/139,145.75 = 65,065.71/x
  3. Step 3: Cross multiply
    100,864.16x = 139,145.75 × 65,065.71
  4. Step 4: Simplify right side
    100,864.16x = 9,053,616,691.90
  5. Step 5: Solve for x
    x = 9,053,616,691.90/100,864.16
  6. Step 6: Final answer
    x = 89,760.50

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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.