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Finding the Fourth Proportional to 138,491.19, 191,117.97 and 74,829.15

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Solution

The fourth proportional to 138,491.19, 191,117.97 and 74,829.15 is: 103,264.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,491.19 : 191,117.97 = 74,829.15 : x
  2. Step 2: Convert to fraction form
    138,491.19/191,117.97 = 74,829.15/x
  3. Step 3: Cross multiply
    138,491.19x = 191,117.97 × 74,829.15
  4. Step 4: Simplify right side
    138,491.19x = 14,301,195,244.83
  5. Step 5: Solve for x
    x = 14,301,195,244.83/138,491.19
  6. Step 6: Final answer
    x = 103,264.30

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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.