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Finding the Fourth Proportional to 112,645.61, 155,451 and 61,658.61

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Solution

The fourth proportional to 112,645.61, 155,451 and 61,658.61 is: 85,088.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,645.61 : 155,451 = 61,658.61 : x
  2. Step 2: Convert to fraction form
    112,645.61/155,451 = 61,658.61/x
  3. Step 3: Cross multiply
    112,645.61x = 155,451 × 61,658.61
  4. Step 4: Simplify right side
    112,645.61x = 9,584,892,583.11
  5. Step 5: Solve for x
    x = 9,584,892,583.11/112,645.61
  6. Step 6: Final answer
    x = 85,088.91

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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.