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Finding the Fourth Proportional to 122,609.92, 183,909.78 and 42,666.20

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Solution

The fourth proportional to 122,609.92, 183,909.78 and 42,666.20 is: 63,997.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,609.92 : 183,909.78 = 42,666.20 : x
  2. Step 2: Convert to fraction form
    122,609.92/183,909.78 = 42,666.20/x
  3. Step 3: Cross multiply
    122,609.92x = 183,909.78 × 42,666.20
  4. Step 4: Simplify right side
    122,609.92x = 7,846,730,535.89
  5. Step 5: Solve for x
    x = 7,846,730,535.89/122,609.92
  6. Step 6: Final answer
    x = 63,997.52

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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.