Home / 138,591.41-191,256.13-74,929.21

Finding the Fourth Proportional to 138,591.41, 191,256.13 and 74,929.21

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Solution

The fourth proportional to 138,591.41, 191,256.13 and 74,929.21 is: 103,402.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,591.41 : 191,256.13 = 74,929.21 : x
  2. Step 2: Convert to fraction form
    138,591.41/191,256.13 = 74,929.21/x
  3. Step 3: Cross multiply
    138,591.41x = 191,256.13 × 74,929.21
  4. Step 4: Simplify right side
    138,591.41x = 14,330,669,922.60
  5. Step 5: Solve for x
    x = 14,330,669,922.60/138,591.41
  6. Step 6: Final answer
    x = 103,402.29

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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.