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Finding the Fourth Proportional to 137,512.60, 189,730.79 and 79,354.60

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Solution

The fourth proportional to 137,512.60, 189,730.79 and 79,354.60 is: 109,488.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,512.60 : 189,730.79 = 79,354.60 : x
  2. Step 2: Convert to fraction form
    137,512.60/189,730.79 = 79,354.60/x
  3. Step 3: Cross multiply
    137,512.60x = 189,730.79 × 79,354.60
  4. Step 4: Simplify right side
    137,512.60x = 15,056,010,374.61
  5. Step 5: Solve for x
    x = 15,056,010,374.61/137,512.60
  6. Step 6: Final answer
    x = 109,488.23

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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.