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Finding the Fourth Proportional to 98,620, 136,105.12 and 58,346.70

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Solution

The fourth proportional to 98,620, 136,105.12 and 58,346.70 is: 80,524.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,620 : 136,105.12 = 58,346.70 : x
  2. Step 2: Convert to fraction form
    98,620/136,105.12 = 58,346.70/x
  3. Step 3: Cross multiply
    98,620x = 136,105.12 × 58,346.70
  4. Step 4: Simplify right side
    98,620x = 7,941,284,605.10
  5. Step 5: Solve for x
    x = 7,941,284,605.10/98,620
  6. Step 6: Final answer
    x = 80,524.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.