Home / 142,864.70-197,155.68-78,332.60

Finding the Fourth Proportional to 142,864.70, 197,155.68 and 78,332.60

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Solution

The fourth proportional to 142,864.70, 197,155.68 and 78,332.60 is: 108,100.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,864.70 : 197,155.68 = 78,332.60 : x
  2. Step 2: Convert to fraction form
    142,864.70/197,155.68 = 78,332.60/x
  3. Step 3: Cross multiply
    142,864.70x = 197,155.68 × 78,332.60
  4. Step 4: Simplify right side
    142,864.70x = 15,443,717,019.17
  5. Step 5: Solve for x
    x = 15,443,717,019.17/142,864.70
  6. Step 6: Final answer
    x = 108,100.30

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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.