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Finding the Fourth Proportional to 145,138.97, 200,294.26 and 79,730.56

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Solution

The fourth proportional to 145,138.97, 200,294.26 and 79,730.56 is: 110,029.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,138.97 : 200,294.26 = 79,730.56 : x
  2. Step 2: Convert to fraction form
    145,138.97/200,294.26 = 79,730.56/x
  3. Step 3: Cross multiply
    145,138.97x = 200,294.26 × 79,730.56
  4. Step 4: Simplify right side
    145,138.97x = 15,969,573,095.28
  5. Step 5: Solve for x
    x = 15,969,573,095.28/145,138.97
  6. Step 6: Final answer
    x = 110,029.53

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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.