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Finding the Fourth Proportional to 112,332, 155,018.16 and 72,588

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Solution

The fourth proportional to 112,332, 155,018.16 and 72,588 is: 100,171.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,332 : 155,018.16 = 72,588 : x
  2. Step 2: Convert to fraction form
    112,332/155,018.16 = 72,588/x
  3. Step 3: Cross multiply
    112,332x = 155,018.16 × 72,588
  4. Step 4: Simplify right side
    112,332x = 11,252,458,198.08
  5. Step 5: Solve for x
    x = 11,252,458,198.08/112,332
  6. Step 6: Final answer
    x = 100,171.44

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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.