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Finding the Fourth Proportional to 108,730.76, 149,951.05 and 85,774.55

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Solution

The fourth proportional to 108,730.76, 149,951.05 and 85,774.55 is: 118,292.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,730.76 : 149,951.05 = 85,774.55 : x
  2. Step 2: Convert to fraction form
    108,730.76/149,951.05 = 85,774.55/x
  3. Step 3: Cross multiply
    108,730.76x = 149,951.05 × 85,774.55
  4. Step 4: Simplify right side
    108,730.76x = 12,861,982,871.59
  5. Step 5: Solve for x
    x = 12,861,982,871.59/108,730.76
  6. Step 6: Final answer
    x = 118,292.04

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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.