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Finding the Fourth Proportional to 138,875.79, 191,571.86 and 113,062.11

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Solution

The fourth proportional to 138,875.79, 191,571.86 and 113,062.11 is: 155,963.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,875.79 : 191,571.86 = 113,062.11 : x
  2. Step 2: Convert to fraction form
    138,875.79/191,571.86 = 113,062.11/x
  3. Step 3: Cross multiply
    138,875.79x = 191,571.86 × 113,062.11
  4. Step 4: Simplify right side
    138,875.79x = 21,659,518,142.91
  5. Step 5: Solve for x
    x = 21,659,518,142.91/138,875.79
  6. Step 6: Final answer
    x = 155,963.24

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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.