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Finding the Fourth Proportional to 58,791.68, 81,124.80 and 36,142.40

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Solution

The fourth proportional to 58,791.68, 81,124.80 and 36,142.40 is: 49,871.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,791.68 : 81,124.80 = 36,142.40 : x
  2. Step 2: Convert to fraction form
    58,791.68/81,124.80 = 36,142.40/x
  3. Step 3: Cross multiply
    58,791.68x = 81,124.80 × 36,142.40
  4. Step 4: Simplify right side
    58,791.68x = 2,932,044,971.52
  5. Step 5: Solve for x
    x = 2,932,044,971.52/58,791.68
  6. Step 6: Final answer
    x = 49,871.77

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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.