Home / 86,520.20-129,670.95-77,116.10

Finding the Fourth Proportional to 86,520.20, 129,670.95 and 77,116.10

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Solution

The fourth proportional to 86,520.20, 129,670.95 and 77,116.10 is: 115,576.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,520.20 : 129,670.95 = 77,116.10 : x
  2. Step 2: Convert to fraction form
    86,520.20/129,670.95 = 77,116.10/x
  3. Step 3: Cross multiply
    86,520.20x = 129,670.95 × 77,116.10
  4. Step 4: Simplify right side
    86,520.20x = 9,999,717,947.30
  5. Step 5: Solve for x
    x = 9,999,717,947.30/86,520.20
  6. Step 6: Final answer
    x = 115,576.69

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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.