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Finding the Fourth Proportional to 112,658.70, 155,476.50 and 64,915.14

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Solution

The fourth proportional to 112,658.70, 155,476.50 and 64,915.14 is: 89,587.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,658.70 : 155,476.50 = 64,915.14 : x
  2. Step 2: Convert to fraction form
    112,658.70/155,476.50 = 64,915.14/x
  3. Step 3: Cross multiply
    112,658.70x = 155,476.50 × 64,915.14
  4. Step 4: Simplify right side
    112,658.70x = 10,092,778,764.21
  5. Step 5: Solve for x
    x = 10,092,778,764.21/112,658.70
  6. Step 6: Final answer
    x = 89,587.21

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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.