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Finding the Fourth Proportional to 138,952.56, 191,820.65 and 93,091.17

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Solution

The fourth proportional to 138,952.56, 191,820.65 and 93,091.17 is: 128,510.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,952.56 : 191,820.65 = 93,091.17 : x
  2. Step 2: Convert to fraction form
    138,952.56/191,820.65 = 93,091.17/x
  3. Step 3: Cross multiply
    138,952.56x = 191,820.65 × 93,091.17
  4. Step 4: Simplify right side
    138,952.56x = 17,856,808,971.39
  5. Step 5: Solve for x
    x = 17,856,808,971.39/138,952.56
  6. Step 6: Final answer
    x = 128,510.11

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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.