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Finding the Fourth Proportional to 74,695.40, 112,040.40 and 30,320.90

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Solution

The fourth proportional to 74,695.40, 112,040.40 and 30,320.90 is: 45,480.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,695.40 : 112,040.40 = 30,320.90 : x
  2. Step 2: Convert to fraction form
    74,695.40/112,040.40 = 30,320.90/x
  3. Step 3: Cross multiply
    74,695.40x = 112,040.40 × 30,320.90
  4. Step 4: Simplify right side
    74,695.40x = 3,397,165,764.36
  5. Step 5: Solve for x
    x = 3,397,165,764.36/74,695.40
  6. Step 6: Final answer
    x = 45,480.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.