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Finding the Fourth Proportional to 138,575.62, 191,234.50 and 74,913.42

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Solution

The fourth proportional to 138,575.62, 191,234.50 and 74,913.42 is: 103,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,575.62 : 191,234.50 = 74,913.42 : x
  2. Step 2: Convert to fraction form
    138,575.62/191,234.50 = 74,913.42/x
  3. Step 3: Cross multiply
    138,575.62x = 191,234.50 × 74,913.42
  4. Step 4: Simplify right side
    138,575.62x = 14,326,030,416.99
  5. Step 5: Solve for x
    x = 14,326,030,416.99/138,575.62
  6. Step 6: Final answer
    x = 103,380.60

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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.