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Finding the Fourth Proportional to 122,110.10, 183,165.15 and 86,680.70

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Solution

The fourth proportional to 122,110.10, 183,165.15 and 86,680.70 is: 130,021.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,110.10 : 183,165.15 = 86,680.70 : x
  2. Step 2: Convert to fraction form
    122,110.10/183,165.15 = 86,680.70/x
  3. Step 3: Cross multiply
    122,110.10x = 183,165.15 × 86,680.70
  4. Step 4: Simplify right side
    122,110.10x = 15,876,883,417.61
  5. Step 5: Solve for x
    x = 15,876,883,417.61/122,110.10
  6. Step 6: Final answer
    x = 130,021.05

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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.