Home / 86,320.20-129,480.30-51,299.40

Finding the Fourth Proportional to 86,320.20, 129,480.30 and 51,299.40

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Solution

The fourth proportional to 86,320.20, 129,480.30 and 51,299.40 is: 76,949.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,320.20 : 129,480.30 = 51,299.40 : x
  2. Step 2: Convert to fraction form
    86,320.20/129,480.30 = 51,299.40/x
  3. Step 3: Cross multiply
    86,320.20x = 129,480.30 × 51,299.40
  4. Step 4: Simplify right side
    86,320.20x = 6,642,261,701.82
  5. Step 5: Solve for x
    x = 6,642,261,701.82/86,320.20
  6. Step 6: Final answer
    x = 76,949.10

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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.