Home / 138,631.71-191,310.80-74,968.59

Finding the Fourth Proportional to 138,631.71, 191,310.80 and 74,968.59

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Solution

The fourth proportional to 138,631.71, 191,310.80 and 74,968.59 is: 103,456.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,631.71 : 191,310.80 = 74,968.59 : x
  2. Step 2: Convert to fraction form
    138,631.71/191,310.80 = 74,968.59/x
  3. Step 3: Cross multiply
    138,631.71x = 191,310.80 × 74,968.59
  4. Step 4: Simplify right side
    138,631.71x = 14,342,300,552.93
  5. Step 5: Solve for x
    x = 14,342,300,552.93/138,631.71
  6. Step 6: Final answer
    x = 103,456.13

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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.