Home / 138,451.47-191,063.13-74,789.28

Finding the Fourth Proportional to 138,451.47, 191,063.13 and 74,789.28

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Solution

The fourth proportional to 138,451.47, 191,063.13 and 74,789.28 is: 103,209.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,451.47 : 191,063.13 = 74,789.28 : x
  2. Step 2: Convert to fraction form
    138,451.47/191,063.13 = 74,789.28/x
  3. Step 3: Cross multiply
    138,451.47x = 191,063.13 × 74,789.28
  4. Step 4: Simplify right side
    138,451.47x = 14,289,473,927.25
  5. Step 5: Solve for x
    x = 14,289,473,927.25/138,451.47
  6. Step 6: Final answer
    x = 103,209.26

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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.