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Finding the Fourth Proportional to 79,442.38, 109,649.40 and 45,470.48

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Solution

The fourth proportional to 79,442.38, 109,649.40 and 45,470.48 is: 62,760.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,442.38 : 109,649.40 = 45,470.48 : x
  2. Step 2: Convert to fraction form
    79,442.38/109,649.40 = 45,470.48/x
  3. Step 3: Cross multiply
    79,442.38x = 109,649.40 × 45,470.48
  4. Step 4: Simplify right side
    79,442.38x = 4,985,810,849.71
  5. Step 5: Solve for x
    x = 4,985,810,849.71/79,442.38
  6. Step 6: Final answer
    x = 62,760.09

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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.