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Finding the Fourth Proportional to 84,007.10, 125,864.85 and 78,758.30

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Solution

The fourth proportional to 84,007.10, 125,864.85 and 78,758.30 is: 118,000.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,007.10 : 125,864.85 = 78,758.30 : x
  2. Step 2: Convert to fraction form
    84,007.10/125,864.85 = 78,758.30/x
  3. Step 3: Cross multiply
    84,007.10x = 125,864.85 × 78,758.30
  4. Step 4: Simplify right side
    84,007.10x = 9,912,901,615.76
  5. Step 5: Solve for x
    x = 9,912,901,615.76/84,007.10
  6. Step 6: Final answer
    x = 118,000.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.