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Finding the Fourth Proportional to 122,279.40, 183,419.10 and 75,040.20

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Solution

The fourth proportional to 122,279.40, 183,419.10 and 75,040.20 is: 112,560.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,279.40 : 183,419.10 = 75,040.20 : x
  2. Step 2: Convert to fraction form
    122,279.40/183,419.10 = 75,040.20/x
  3. Step 3: Cross multiply
    122,279.40x = 183,419.10 × 75,040.20
  4. Step 4: Simplify right side
    122,279.40x = 13,763,805,947.82
  5. Step 5: Solve for x
    x = 13,763,805,947.82/122,279.40
  6. Step 6: Final answer
    x = 112,560.30

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1.5x scale

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.