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Finding the Fourth Proportional to 78,737.89, 108,658.21 and 42,927.89

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Solution

The fourth proportional to 78,737.89, 108,658.21 and 42,927.89 is: 59,240.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,737.89 : 108,658.21 = 42,927.89 : x
  2. Step 2: Convert to fraction form
    78,737.89/108,658.21 = 42,927.89/x
  3. Step 3: Cross multiply
    78,737.89x = 108,658.21 × 42,927.89
  4. Step 4: Simplify right side
    78,737.89x = 4,664,467,950.16
  5. Step 5: Solve for x
    x = 4,664,467,950.16/78,737.89
  6. Step 6: Final answer
    x = 59,240.45

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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.