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Finding the Fourth Proportional to 100,734.79, 138,967.41 and 60,378.49

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Solution

The fourth proportional to 100,734.79, 138,967.41 and 60,378.49 is: 83,294.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,734.79 : 138,967.41 = 60,378.49 : x
  2. Step 2: Convert to fraction form
    100,734.79/138,967.41 = 60,378.49/x
  3. Step 3: Cross multiply
    100,734.79x = 138,967.41 × 60,378.49
  4. Step 4: Simplify right side
    100,734.79x = 8,390,642,375.01
  5. Step 5: Solve for x
    x = 8,390,642,375.01/100,734.79
  6. Step 6: Final answer
    x = 83,294.38

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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.