Home / 99,138.16-136,760.40-63,290.80

Finding the Fourth Proportional to 99,138.16, 136,760.40 and 63,290.80

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Solution

The fourth proportional to 99,138.16, 136,760.40 and 63,290.80 is: 87,309.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,138.16 : 136,760.40 = 63,290.80 : x
  2. Step 2: Convert to fraction form
    99,138.16/136,760.40 = 63,290.80/x
  3. Step 3: Cross multiply
    99,138.16x = 136,760.40 × 63,290.80
  4. Step 4: Simplify right side
    99,138.16x = 8,655,675,124.32
  5. Step 5: Solve for x
    x = 8,655,675,124.32/99,138.16
  6. Step 6: Final answer
    x = 87,309.22

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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.