Home / 138,411.28-191,008.23-77,982.89

Finding the Fourth Proportional to 138,411.28, 191,008.23 and 77,982.89

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Solution

The fourth proportional to 138,411.28, 191,008.23 and 77,982.89 is: 107,616.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,411.28 : 191,008.23 = 77,982.89 : x
  2. Step 2: Convert to fraction form
    138,411.28/191,008.23 = 77,982.89/x
  3. Step 3: Cross multiply
    138,411.28x = 191,008.23 × 77,982.89
  4. Step 4: Simplify right side
    138,411.28x = 14,895,372,541.71
  5. Step 5: Solve for x
    x = 14,895,372,541.71/138,411.28
  6. Step 6: Final answer
    x = 107,616.75

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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.