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Finding the Fourth Proportional to 138,875.51, 191,647.80 and 75,213.15

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Solution

The fourth proportional to 138,875.51, 191,647.80 and 75,213.15 is: 103,793.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,875.51 : 191,647.80 = 75,213.15 : x
  2. Step 2: Convert to fraction form
    138,875.51/191,647.80 = 75,213.15/x
  3. Step 3: Cross multiply
    138,875.51x = 191,647.80 × 75,213.15
  4. Step 4: Simplify right side
    138,875.51x = 14,414,434,728.57
  5. Step 5: Solve for x
    x = 14,414,434,728.57/138,875.51
  6. Step 6: Final answer
    x = 103,793.93

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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.