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Finding the Fourth Proportional to 53,957.61, 80,937.18 and 20,679.39

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Solution

The fourth proportional to 53,957.61, 80,937.18 and 20,679.39 is: 31,019.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,957.61 : 80,937.18 = 20,679.39 : x
  2. Step 2: Convert to fraction form
    53,957.61/80,937.18 = 20,679.39/x
  3. Step 3: Cross multiply
    53,957.61x = 80,937.18 × 20,679.39
  4. Step 4: Simplify right side
    53,957.61x = 1,673,731,510.72
  5. Step 5: Solve for x
    x = 1,673,731,510.72/53,957.61
  6. Step 6: Final answer
    x = 31,019.38

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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.