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Finding the Fourth Proportional to 52,879, 72,979.52 and 30,523

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Solution

The fourth proportional to 52,879, 72,979.52 and 30,523 is: 42,125.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,879 : 72,979.52 = 30,523 : x
  2. Step 2: Convert to fraction form
    52,879/72,979.52 = 30,523/x
  3. Step 3: Cross multiply
    52,879x = 72,979.52 × 30,523
  4. Step 4: Simplify right side
    52,879x = 2,227,553,888.96
  5. Step 5: Solve for x
    x = 2,227,553,888.96/52,879
  6. Step 6: Final answer
    x = 42,125.49

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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.