Home / 78,432.18-108,236.07-42,621.54

Finding the Fourth Proportional to 78,432.18, 108,236.07 and 42,621.54

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Solution

The fourth proportional to 78,432.18, 108,236.07 and 42,621.54 is: 58,817.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,432.18 : 108,236.07 = 42,621.54 : x
  2. Step 2: Convert to fraction form
    78,432.18/108,236.07 = 42,621.54/x
  3. Step 3: Cross multiply
    78,432.18x = 108,236.07 × 42,621.54
  4. Step 4: Simplify right side
    78,432.18x = 4,613,187,986.95
  5. Step 5: Solve for x
    x = 4,613,187,986.95/78,432.18
  6. Step 6: Final answer
    x = 58,817.54

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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.