Home / 78,342.09-108,110.40-42,531.80

Finding the Fourth Proportional to 78,342.09, 108,110.40 and 42,531.80

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Solution

The fourth proportional to 78,342.09, 108,110.40 and 42,531.80 is: 58,692.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,342.09 : 108,110.40 = 42,531.80 : x
  2. Step 2: Convert to fraction form
    78,342.09/108,110.40 = 42,531.80/x
  3. Step 3: Cross multiply
    78,342.09x = 108,110.40 × 42,531.80
  4. Step 4: Simplify right side
    78,342.09x = 4,598,129,370.17
  5. Step 5: Solve for x
    x = 4,598,129,370.17/78,342.09
  6. Step 6: Final answer
    x = 58,692.96

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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.