Home / 138,732.02-191,428.53-79,104.50

Finding the Fourth Proportional to 138,732.02, 191,428.53 and 79,104.50

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Solution

The fourth proportional to 138,732.02, 191,428.53 and 79,104.50 is: 109,151.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,732.02 : 191,428.53 = 79,104.50 : x
  2. Step 2: Convert to fraction form
    138,732.02/191,428.53 = 79,104.50/x
  3. Step 3: Cross multiply
    138,732.02x = 191,428.53 × 79,104.50
  4. Step 4: Simplify right side
    138,732.02x = 15,142,858,151.39
  5. Step 5: Solve for x
    x = 15,142,858,151.39/138,732.02
  6. Step 6: Final answer
    x = 109,151.86

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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.