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Finding the Fourth Proportional to 78,737.20, 118,105.80 and 78,737.20

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Solution

The fourth proportional to 78,737.20, 118,105.80 and 78,737.20 is: 118,105.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,737.20 : 118,105.80 = 78,737.20 : x
  2. Step 2: Convert to fraction form
    78,737.20/118,105.80 = 78,737.20/x
  3. Step 3: Cross multiply
    78,737.20x = 118,105.80 × 78,737.20
  4. Step 4: Simplify right side
    78,737.20x = 9,299,319,995.76
  5. Step 5: Solve for x
    x = 9,299,319,995.76/78,737.20
  6. Step 6: Final answer
    x = 118,105.80

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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.