Home / 131,818.31-181,908.32-71,387.55

Finding the Fourth Proportional to 131,818.31, 181,908.32 and 71,387.55

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Solution

The fourth proportional to 131,818.31, 181,908.32 and 71,387.55 is: 98,514.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,818.31 : 181,908.32 = 71,387.55 : x
  2. Step 2: Convert to fraction form
    131,818.31/181,908.32 = 71,387.55/x
  3. Step 3: Cross multiply
    131,818.31x = 181,908.32 × 71,387.55
  4. Step 4: Simplify right side
    131,818.31x = 12,985,989,745.26
  5. Step 5: Solve for x
    x = 12,985,989,745.26/131,818.31
  6. Step 6: Final answer
    x = 98,514.31

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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.