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Finding the Fourth Proportional to 138,549.92, 191,199.76 and 74,887.56

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Solution

The fourth proportional to 138,549.92, 191,199.76 and 74,887.56 is: 103,345.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,549.92 : 191,199.76 = 74,887.56 : x
  2. Step 2: Convert to fraction form
    138,549.92/191,199.76 = 74,887.56/x
  3. Step 3: Cross multiply
    138,549.92x = 191,199.76 × 74,887.56
  4. Step 4: Simplify right side
    138,549.92x = 14,318,483,311.77
  5. Step 5: Solve for x
    x = 14,318,483,311.77/138,549.92
  6. Step 6: Final answer
    x = 103,345.31

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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.