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Finding the Fourth Proportional to 138,590.76, 191,254.68 and 74,928.56

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Solution

The fourth proportional to 138,590.76, 191,254.68 and 74,928.56 is: 103,401.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,590.76 : 191,254.68 = 74,928.56 : x
  2. Step 2: Convert to fraction form
    138,590.76/191,254.68 = 74,928.56/x
  3. Step 3: Cross multiply
    138,590.76x = 191,254.68 × 74,928.56
  4. Step 4: Simplify right side
    138,590.76x = 14,330,437,765.66
  5. Step 5: Solve for x
    x = 14,330,437,765.66/138,590.76
  6. Step 6: Final answer
    x = 103,401.11

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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.