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Finding the Fourth Proportional to 78,374.61, 117,459.18 and 36,249.30

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Solution

The fourth proportional to 78,374.61, 117,459.18 and 36,249.30 is: 54,326.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,374.61 : 117,459.18 = 36,249.30 : x
  2. Step 2: Convert to fraction form
    78,374.61/117,459.18 = 36,249.30/x
  3. Step 3: Cross multiply
    78,374.61x = 117,459.18 × 36,249.30
  4. Step 4: Simplify right side
    78,374.61x = 4,257,813,053.57
  5. Step 5: Solve for x
    x = 4,257,813,053.57/78,374.61
  6. Step 6: Final answer
    x = 54,326.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.