Home / 138,931.96-191,726.29-75,269.76

Finding the Fourth Proportional to 138,931.96, 191,726.29 and 75,269.76

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Solution

The fourth proportional to 138,931.96, 191,726.29 and 75,269.76 is: 103,872.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,931.96 : 191,726.29 = 75,269.76 : x
  2. Step 2: Convert to fraction form
    138,931.96/191,726.29 = 75,269.76/x
  3. Step 3: Cross multiply
    138,931.96x = 191,726.29 × 75,269.76
  4. Step 4: Simplify right side
    138,931.96x = 14,431,191,600.54
  5. Step 5: Solve for x
    x = 14,431,191,600.54/138,931.96
  6. Step 6: Final answer
    x = 103,872.37

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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.