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Finding the Fourth Proportional to 122,920.70, 183,943.65 and 85,304.30

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Solution

The fourth proportional to 122,920.70, 183,943.65 and 85,304.30 is: 127,652.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,920.70 : 183,943.65 = 85,304.30 : x
  2. Step 2: Convert to fraction form
    122,920.70/183,943.65 = 85,304.30/x
  3. Step 3: Cross multiply
    122,920.70x = 183,943.65 × 85,304.30
  4. Step 4: Simplify right side
    122,920.70x = 15,691,184,302.70
  5. Step 5: Solve for x
    x = 15,691,184,302.70/122,920.70
  6. Step 6: Final answer
    x = 127,652.90

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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.