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Finding the Fourth Proportional to 112,887.92, 155,787.72 and 61,901.84

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Solution

The fourth proportional to 112,887.92, 155,787.72 and 61,901.84 is: 85,425.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,887.92 : 155,787.72 = 61,901.84 : x
  2. Step 2: Convert to fraction form
    112,887.92/155,787.72 = 61,901.84/x
  3. Step 3: Cross multiply
    112,887.92x = 155,787.72 × 61,901.84
  4. Step 4: Simplify right side
    112,887.92x = 9,643,546,517.40
  5. Step 5: Solve for x
    x = 9,643,546,517.40/112,887.92
  6. Step 6: Final answer
    x = 85,425.85

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1.5x scale

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.