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Finding the Fourth Proportional to 115,561.88, 159,472.36 and 64,575.04

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Solution

The fourth proportional to 115,561.88, 159,472.36 and 64,575.04 is: 89,111.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,561.88 : 159,472.36 = 64,575.04 : x
  2. Step 2: Convert to fraction form
    115,561.88/159,472.36 = 64,575.04/x
  3. Step 3: Cross multiply
    115,561.88x = 159,472.36 × 64,575.04
  4. Step 4: Simplify right side
    115,561.88x = 10,297,934,025.89
  5. Step 5: Solve for x
    x = 10,297,934,025.89/115,561.88
  6. Step 6: Final answer
    x = 89,111.86

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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.