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Finding the Fourth Proportional to 79,129.95, 109,201.95 and 45,143.43

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Solution

The fourth proportional to 79,129.95, 109,201.95 and 45,143.43 is: 62,299.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,129.95 : 109,201.95 = 45,143.43 : x
  2. Step 2: Convert to fraction form
    79,129.95/109,201.95 = 45,143.43/x
  3. Step 3: Cross multiply
    79,129.95x = 109,201.95 × 45,143.43
  4. Step 4: Simplify right side
    79,129.95x = 4,929,750,585.69
  5. Step 5: Solve for x
    x = 4,929,750,585.69/79,129.95
  6. Step 6: Final answer
    x = 62,299.43

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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.