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Finding the Fourth Proportional to 52,658.82, 72,670.30 and 28,787.72

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Solution

The fourth proportional to 52,658.82, 72,670.30 and 28,787.72 is: 39,727.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,658.82 : 72,670.30 = 28,787.72 : x
  2. Step 2: Convert to fraction form
    52,658.82/72,670.30 = 28,787.72/x
  3. Step 3: Cross multiply
    52,658.82x = 72,670.30 × 28,787.72
  4. Step 4: Simplify right side
    52,658.82x = 2,092,011,813.40
  5. Step 5: Solve for x
    x = 2,092,011,813.40/52,658.82
  6. Step 6: Final answer
    x = 39,727.66

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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.