Home / 138,828.18-191,562.22-78,397.62

Finding the Fourth Proportional to 138,828.18, 191,562.22 and 78,397.62

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Solution

The fourth proportional to 138,828.18, 191,562.22 and 78,397.62 is: 108,177.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,828.18 : 191,562.22 = 78,397.62 : x
  2. Step 2: Convert to fraction form
    138,828.18/191,562.22 = 78,397.62/x
  3. Step 3: Cross multiply
    138,828.18x = 191,562.22 × 78,397.62
  4. Step 4: Simplify right side
    138,828.18x = 15,018,022,146.11
  5. Step 5: Solve for x
    x = 15,018,022,146.11/138,828.18
  6. Step 6: Final answer
    x = 108,177.05

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1.5x scale

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.