Home / 86,540.90-129,811.35-53,152.70

Finding the Fourth Proportional to 86,540.90, 129,811.35 and 53,152.70

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Solution

The fourth proportional to 86,540.90, 129,811.35 and 53,152.70 is: 79,729.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,540.90 : 129,811.35 = 53,152.70 : x
  2. Step 2: Convert to fraction form
    86,540.90/129,811.35 = 53,152.70/x
  3. Step 3: Cross multiply
    86,540.90x = 129,811.35 × 53,152.70
  4. Step 4: Simplify right side
    86,540.90x = 6,899,823,743.15
  5. Step 5: Solve for x
    x = 6,899,823,743.15/86,540.90
  6. Step 6: Final answer
    x = 79,729.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.