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Finding the Fourth Proportional to 138,608.92, 191,280.42 and 74,946.76

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Solution

The fourth proportional to 138,608.92, 191,280.42 and 74,946.76 is: 103,426.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,608.92 : 191,280.42 = 74,946.76 : x
  2. Step 2: Convert to fraction form
    138,608.92/191,280.42 = 74,946.76/x
  3. Step 3: Cross multiply
    138,608.92x = 191,280.42 × 74,946.76
  4. Step 4: Simplify right side
    138,608.92x = 14,335,847,730.44
  5. Step 5: Solve for x
    x = 14,335,847,730.44/138,608.92
  6. Step 6: Final answer
    x = 103,426.59

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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.