Home / 78,350.56-108,123.58-42,540.20

Finding the Fourth Proportional to 78,350.56, 108,123.58 and 42,540.20

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Solution

The fourth proportional to 78,350.56, 108,123.58 and 42,540.20 is: 58,705.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,350.56 : 108,123.58 = 42,540.20 : x
  2. Step 2: Convert to fraction form
    78,350.56/108,123.58 = 42,540.20/x
  3. Step 3: Cross multiply
    78,350.56x = 108,123.58 × 42,540.20
  4. Step 4: Simplify right side
    78,350.56x = 4,599,598,717.92
  5. Step 5: Solve for x
    x = 4,599,598,717.92/78,350.56
  6. Step 6: Final answer
    x = 58,705.37

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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.