Home / 71,218.93-98,280.45-39,387.15

Finding the Fourth Proportional to 71,218.93, 98,280.45 and 39,387.15

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Solution

The fourth proportional to 71,218.93, 98,280.45 and 39,387.15 is: 54,353.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,218.93 : 98,280.45 = 39,387.15 : x
  2. Step 2: Convert to fraction form
    71,218.93/98,280.45 = 39,387.15/x
  3. Step 3: Cross multiply
    71,218.93x = 98,280.45 × 39,387.15
  4. Step 4: Simplify right side
    71,218.93x = 3,870,986,826.22
  5. Step 5: Solve for x
    x = 3,870,986,826.22/71,218.93
  6. Step 6: Final answer
    x = 54,353.34

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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.