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Finding the Fourth Proportional to 63,421.91, 87,581.07 and 47,478.68

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Solution

The fourth proportional to 63,421.91, 87,581.07 and 47,478.68 is: 65,564.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,421.91 : 87,581.07 = 47,478.68 : x
  2. Step 2: Convert to fraction form
    63,421.91/87,581.07 = 47,478.68/x
  3. Step 3: Cross multiply
    63,421.91x = 87,581.07 × 47,478.68
  4. Step 4: Simplify right side
    63,421.91x = 4,158,233,596.59
  5. Step 5: Solve for x
    x = 4,158,233,596.59/63,421.91
  6. Step 6: Final answer
    x = 65,564.62

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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.