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Finding the Fourth Proportional to 86,487.76, 119,352.90 and 48,761.74

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Solution

The fourth proportional to 86,487.76, 119,352.90 and 48,761.74 is: 67,291.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,487.76 : 119,352.90 = 48,761.74 : x
  2. Step 2: Convert to fraction form
    86,487.76/119,352.90 = 48,761.74/x
  3. Step 3: Cross multiply
    86,487.76x = 119,352.90 × 48,761.74
  4. Step 4: Simplify right side
    86,487.76x = 5,819,855,078.05
  5. Step 5: Solve for x
    x = 5,819,855,078.05/86,487.76
  6. Step 6: Final answer
    x = 67,291.08

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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.