Home / 87,127.04-120,398.76-71,205.68

Finding the Fourth Proportional to 87,127.04, 120,398.76 and 71,205.68

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Solution

The fourth proportional to 87,127.04, 120,398.76 and 71,205.68 is: 98,397.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,127.04 : 120,398.76 = 71,205.68 : x
  2. Step 2: Convert to fraction form
    87,127.04/120,398.76 = 71,205.68/x
  3. Step 3: Cross multiply
    87,127.04x = 120,398.76 × 71,205.68
  4. Step 4: Simplify right side
    87,127.04x = 8,573,075,576.96
  5. Step 5: Solve for x
    x = 8,573,075,576.96/87,127.04
  6. Step 6: Final answer
    x = 98,397.42

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1.5x scale

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.