Home / 142,864.20-197,154.99-78,332.10

Finding the Fourth Proportional to 142,864.20, 197,154.99 and 78,332.10

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Solution

The fourth proportional to 142,864.20, 197,154.99 and 78,332.10 is: 108,099.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,864.20 : 197,154.99 = 78,332.10 : x
  2. Step 2: Convert to fraction form
    142,864.20/197,154.99 = 78,332.10/x
  3. Step 3: Cross multiply
    142,864.20x = 197,154.99 × 78,332.10
  4. Step 4: Simplify right side
    142,864.20x = 15,443,564,392.18
  5. Step 5: Solve for x
    x = 15,443,564,392.18/142,864.20
  6. Step 6: Final answer
    x = 108,099.61

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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.