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Finding the Fourth Proportional to 63,345.84, 87,345.72 and 47,379.12

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Solution

The fourth proportional to 63,345.84, 87,345.72 and 47,379.12 is: 65,329.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,345.84 : 87,345.72 = 47,379.12 : x
  2. Step 2: Convert to fraction form
    63,345.84/87,345.72 = 47,379.12/x
  3. Step 3: Cross multiply
    63,345.84x = 87,345.72 × 47,379.12
  4. Step 4: Simplify right side
    63,345.84x = 4,138,363,349.37
  5. Step 5: Solve for x
    x = 4,138,363,349.37/63,345.84
  6. Step 6: Final answer
    x = 65,329.68

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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.