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Finding the Fourth Proportional to 138,872.79, 191,567.71 and 113,059.11

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Solution

The fourth proportional to 138,872.79, 191,567.71 and 113,059.11 is: 155,959.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,872.79 : 191,567.71 = 113,059.11 : x
  2. Step 2: Convert to fraction form
    138,872.79/191,567.71 = 113,059.11/x
  3. Step 3: Cross multiply
    138,872.79x = 191,567.71 × 113,059.11
  4. Step 4: Simplify right side
    138,872.79x = 21,658,475,657.04
  5. Step 5: Solve for x
    x = 21,658,475,657.04/138,872.79
  6. Step 6: Final answer
    x = 155,959.10

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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.