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Finding the Fourth Proportional to 99,080, 136,730.40 and 54,370.88

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Solution

The fourth proportional to 99,080, 136,730.40 and 54,370.88 is: 75,031.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,080 : 136,730.40 = 54,370.88 : x
  2. Step 2: Convert to fraction form
    99,080/136,730.40 = 54,370.88/x
  3. Step 3: Cross multiply
    99,080x = 136,730.40 × 54,370.88
  4. Step 4: Simplify right side
    99,080x = 7,434,152,170.75
  5. Step 5: Solve for x
    x = 7,434,152,170.75/99,080
  6. Step 6: Final answer
    x = 75,031.81

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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.