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Finding the Fourth Proportional to 122,010.80, 183,016.20 and 86,581.40

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Solution

The fourth proportional to 122,010.80, 183,016.20 and 86,581.40 is: 129,872.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,010.80 : 183,016.20 = 86,581.40 : x
  2. Step 2: Convert to fraction form
    122,010.80/183,016.20 = 86,581.40/x
  3. Step 3: Cross multiply
    122,010.80x = 183,016.20 × 86,581.40
  4. Step 4: Simplify right side
    122,010.80x = 15,845,798,818.68
  5. Step 5: Solve for x
    x = 15,845,798,818.68/122,010.80
  6. Step 6: Final answer
    x = 129,872.10

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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.