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Finding the Fourth Proportional to 77,545.60, 107,013.90 and 45,712.60

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Solution

The fourth proportional to 77,545.60, 107,013.90 and 45,712.60 is: 63,083.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,545.60 : 107,013.90 = 45,712.60 : x
  2. Step 2: Convert to fraction form
    77,545.60/107,013.90 = 45,712.60/x
  3. Step 3: Cross multiply
    77,545.60x = 107,013.90 × 45,712.60
  4. Step 4: Simplify right side
    77,545.60x = 4,891,883,605.14
  5. Step 5: Solve for x
    x = 4,891,883,605.14/77,545.60
  6. Step 6: Final answer
    x = 63,083.96

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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.