Home / 71,512.16-98,686.80-39,686.18

Finding the Fourth Proportional to 71,512.16, 98,686.80 and 39,686.18

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Solution

The fourth proportional to 71,512.16, 98,686.80 and 39,686.18 is: 54,766.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,512.16 : 98,686.80 = 39,686.18 : x
  2. Step 2: Convert to fraction form
    71,512.16/98,686.80 = 39,686.18/x
  3. Step 3: Cross multiply
    71,512.16x = 98,686.80 × 39,686.18
  4. Step 4: Simplify right side
    71,512.16x = 3,916,502,108.42
  5. Step 5: Solve for x
    x = 3,916,502,108.42/71,512.16
  6. Step 6: Final answer
    x = 54,766.94

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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.