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Finding the Fourth Proportional to 112,661.66, 155,472.30 and 64,914

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Solution

The fourth proportional to 112,661.66, 155,472.30 and 64,914 is: 89,580.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,661.66 : 155,472.30 = 64,914 : x
  2. Step 2: Convert to fraction form
    112,661.66/155,472.30 = 64,914/x
  3. Step 3: Cross multiply
    112,661.66x = 155,472.30 × 64,914
  4. Step 4: Simplify right side
    112,661.66x = 10,092,328,882.20
  5. Step 5: Solve for x
    x = 10,092,328,882.20/112,661.66
  6. Step 6: Final answer
    x = 89,580.86

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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.