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Finding the Fourth Proportional to 131,877.79, 181,991.10 and 71,449.93

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Solution

The fourth proportional to 131,877.79, 181,991.10 and 71,449.93 is: 98,600.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,877.79 : 181,991.10 = 71,449.93 : x
  2. Step 2: Convert to fraction form
    131,877.79/181,991.10 = 71,449.93/x
  3. Step 3: Cross multiply
    131,877.79x = 181,991.10 × 71,449.93
  4. Step 4: Simplify right side
    131,877.79x = 13,003,251,851.05
  5. Step 5: Solve for x
    x = 13,003,251,851.05/131,877.79
  6. Step 6: Final answer
    x = 98,600.77

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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.