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Finding the Fourth Proportional to 53,710.47, 80,545.01 and 20,412.99

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Solution

The fourth proportional to 53,710.47, 80,545.01 and 20,412.99 is: 30,611.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,710.47 : 80,545.01 = 20,412.99 : x
  2. Step 2: Convert to fraction form
    53,710.47/80,545.01 = 20,412.99/x
  3. Step 3: Cross multiply
    53,710.47x = 80,545.01 × 20,412.99
  4. Step 4: Simplify right side
    53,710.47x = 1,644,164,381.61
  5. Step 5: Solve for x
    x = 1,644,164,381.61/53,710.47
  6. Step 6: Final answer
    x = 30,611.62

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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.