Home / 138,457.10-208,119.18-91,374.76

Finding the Fourth Proportional to 138,457.10, 208,119.18 and 91,374.76

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Solution

The fourth proportional to 138,457.10, 208,119.18 and 91,374.76 is: 137,348.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,457.10 : 208,119.18 = 91,374.76 : x
  2. Step 2: Convert to fraction form
    138,457.10/208,119.18 = 91,374.76/x
  3. Step 3: Cross multiply
    138,457.10x = 208,119.18 × 91,374.76
  4. Step 4: Simplify right side
    138,457.10x = 19,016,840,123.90
  5. Step 5: Solve for x
    x = 19,016,840,123.90/138,457.10
  6. Step 6: Final answer
    x = 137,348.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.