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Finding the Fourth Proportional to 53,125.20, 79,687.80 and 38,437.20

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Solution

The fourth proportional to 53,125.20, 79,687.80 and 38,437.20 is: 57,655.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,125.20 : 79,687.80 = 38,437.20 : x
  2. Step 2: Convert to fraction form
    53,125.20/79,687.80 = 38,437.20/x
  3. Step 3: Cross multiply
    53,125.20x = 79,687.80 × 38,437.20
  4. Step 4: Simplify right side
    53,125.20x = 3,062,975,906.16
  5. Step 5: Solve for x
    x = 3,062,975,906.16/53,125.20
  6. Step 6: Final answer
    x = 57,655.80

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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.