Home / 86,818.32-130,878.21-81,031.65

Finding the Fourth Proportional to 86,818.32, 130,878.21 and 81,031.65

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Solution

The fourth proportional to 86,818.32, 130,878.21 and 81,031.65 is: 122,154.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,818.32 : 130,878.21 = 81,031.65 : x
  2. Step 2: Convert to fraction form
    86,818.32/130,878.21 = 81,031.65/x
  3. Step 3: Cross multiply
    86,818.32x = 130,878.21 × 81,031.65
  4. Step 4: Simplify right side
    86,818.32x = 10,605,277,305.35
  5. Step 5: Solve for x
    x = 10,605,277,305.35/86,818.32
  6. Step 6: Final answer
    x = 122,154.83

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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.