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Finding the Fourth Proportional to 99,216, 136,937.52 and 60,987.60

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Solution

The fourth proportional to 99,216, 136,937.52 and 60,987.60 is: 84,174.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,216 : 136,937.52 = 60,987.60 : x
  2. Step 2: Convert to fraction form
    99,216/136,937.52 = 60,987.60/x
  3. Step 3: Cross multiply
    99,216x = 136,937.52 × 60,987.60
  4. Step 4: Simplify right side
    99,216x = 8,351,490,694.75
  5. Step 5: Solve for x
    x = 8,351,490,694.75/99,216
  6. Step 6: Final answer
    x = 84,174.84

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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.