Home / 78,340.59-108,110.61-42,530.74

Finding the Fourth Proportional to 78,340.59, 108,110.61 and 42,530.74

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Solution

The fourth proportional to 78,340.59, 108,110.61 and 42,530.74 is: 58,692.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,340.59 : 108,110.61 = 42,530.74 : x
  2. Step 2: Convert to fraction form
    78,340.59/108,110.61 = 42,530.74/x
  3. Step 3: Cross multiply
    78,340.59x = 108,110.61 × 42,530.74
  4. Step 4: Simplify right side
    78,340.59x = 4,598,023,974.87
  5. Step 5: Solve for x
    x = 4,598,023,974.87/78,340.59
  6. Step 6: Final answer
    x = 58,692.74

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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.