Home / 138,766.10-191,497.82-78,337.49

Finding the Fourth Proportional to 138,766.10, 191,497.82 and 78,337.49

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Solution

The fourth proportional to 138,766.10, 191,497.82 and 78,337.49 is: 108,106.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,766.10 : 191,497.82 = 78,337.49 : x
  2. Step 2: Convert to fraction form
    138,766.10/191,497.82 = 78,337.49/x
  3. Step 3: Cross multiply
    138,766.10x = 191,497.82 × 78,337.49
  4. Step 4: Simplify right side
    138,766.10x = 15,001,457,210.10
  5. Step 5: Solve for x
    x = 15,001,457,210.10/138,766.10
  6. Step 6: Final answer
    x = 108,106.07

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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.