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Finding the Fourth Proportional to 99,600, 137,446.20 and 54,278.39

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Solution

The fourth proportional to 99,600, 137,446.20 and 54,278.39 is: 74,903.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,600 : 137,446.20 = 54,278.39 : x
  2. Step 2: Convert to fraction form
    99,600/137,446.20 = 54,278.39/x
  3. Step 3: Cross multiply
    99,600x = 137,446.20 × 54,278.39
  4. Step 4: Simplify right side
    99,600x = 7,460,357,760.39
  5. Step 5: Solve for x
    x = 7,460,357,760.39/99,600
  6. Step 6: Final answer
    x = 74,903.19

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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.