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Finding the Fourth Proportional to 138,967.90, 191,775.80 and 75,305.70

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Solution

The fourth proportional to 138,967.90, 191,775.80 and 75,305.70 is: 103,921.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,967.90 : 191,775.80 = 75,305.70 : x
  2. Step 2: Convert to fraction form
    138,967.90/191,775.80 = 75,305.70/x
  3. Step 3: Cross multiply
    138,967.90x = 191,775.80 × 75,305.70
  4. Step 4: Simplify right side
    138,967.90x = 14,441,811,050.32
  5. Step 5: Solve for x
    x = 14,441,811,050.32/138,967.90
  6. Step 6: Final answer
    x = 103,921.92

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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.