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Finding the Fourth Proportional to 63,672.85, 87,895.47 and 42,980.86

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Solution

The fourth proportional to 63,672.85, 87,895.47 and 42,980.86 is: 59,331.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,672.85 : 87,895.47 = 42,980.86 : x
  2. Step 2: Convert to fraction form
    63,672.85/87,895.47 = 42,980.86/x
  3. Step 3: Cross multiply
    63,672.85x = 87,895.47 × 42,980.86
  4. Step 4: Simplify right side
    63,672.85x = 3,777,822,590.38
  5. Step 5: Solve for x
    x = 3,777,822,590.38/63,672.85
  6. Step 6: Final answer
    x = 59,331.77

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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.