Home / 86,959.21-131,031.13-71,510.28

Finding the Fourth Proportional to 86,959.21, 131,031.13 and 71,510.28

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Solution

The fourth proportional to 86,959.21, 131,031.13 and 71,510.28 is: 107,752.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,959.21 : 131,031.13 = 71,510.28 : x
  2. Step 2: Convert to fraction form
    86,959.21/131,031.13 = 71,510.28/x
  3. Step 3: Cross multiply
    86,959.21x = 131,031.13 × 71,510.28
  4. Step 4: Simplify right side
    86,959.21x = 9,370,073,122.59
  5. Step 5: Solve for x
    x = 9,370,073,122.59/86,959.21
  6. Step 6: Final answer
    x = 107,752.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.