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Finding the Fourth Proportional to 138,937.69, 191,734.19 and 75,275.48

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Solution

The fourth proportional to 138,937.69, 191,734.19 and 75,275.48 is: 103,880.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,937.69 : 191,734.19 = 75,275.48 : x
  2. Step 2: Convert to fraction form
    138,937.69/191,734.19 = 75,275.48/x
  3. Step 3: Cross multiply
    138,937.69x = 191,734.19 × 75,275.48
  4. Step 4: Simplify right side
    138,937.69x = 14,432,883,852.19
  5. Step 5: Solve for x
    x = 14,432,883,852.19/138,937.69
  6. Step 6: Final answer
    x = 103,880.27

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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.