Home / 138,631.26-191,302.23-79,011.42

Finding the Fourth Proportional to 138,631.26, 191,302.23 and 79,011.42

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Solution

The fourth proportional to 138,631.26, 191,302.23 and 79,011.42 is: 109,030.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,631.26 : 191,302.23 = 79,011.42 : x
  2. Step 2: Convert to fraction form
    138,631.26/191,302.23 = 79,011.42/x
  3. Step 3: Cross multiply
    138,631.26x = 191,302.23 × 79,011.42
  4. Step 4: Simplify right side
    138,631.26x = 15,115,060,841.47
  5. Step 5: Solve for x
    x = 15,115,060,841.47/138,631.26
  6. Step 6: Final answer
    x = 109,030.68

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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.