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Finding the Fourth Proportional to 112,660.60, 155,479.07 and 64,916.98

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Solution

The fourth proportional to 112,660.60, 155,479.07 and 64,916.98 is: 89,589.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,660.60 : 155,479.07 = 64,916.98 : x
  2. Step 2: Convert to fraction form
    112,660.60/155,479.07 = 64,916.98/x
  3. Step 3: Cross multiply
    112,660.60x = 155,479.07 × 64,916.98
  4. Step 4: Simplify right side
    112,660.60x = 10,093,231,677.61
  5. Step 5: Solve for x
    x = 10,093,231,677.61/112,660.60
  6. Step 6: Final answer
    x = 89,589.72

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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.