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Finding the Fourth Proportional to 115,480.98, 159,354.69 and 64,489.76

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Solution

The fourth proportional to 115,480.98, 159,354.69 and 64,489.76 is: 88,990.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,480.98 : 159,354.69 = 64,489.76 : x
  2. Step 2: Convert to fraction form
    115,480.98/159,354.69 = 64,489.76/x
  3. Step 3: Cross multiply
    115,480.98x = 159,354.69 × 64,489.76
  4. Step 4: Simplify right side
    115,480.98x = 10,276,744,916.20
  5. Step 5: Solve for x
    x = 10,276,744,916.20/115,480.98
  6. Step 6: Final answer
    x = 88,990.80

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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.