Home / 86,579.90-129,869.85-72,801.80

Finding the Fourth Proportional to 86,579.90, 129,869.85 and 72,801.80

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Solution

The fourth proportional to 86,579.90, 129,869.85 and 72,801.80 is: 109,202.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,579.90 : 129,869.85 = 72,801.80 : x
  2. Step 2: Convert to fraction form
    86,579.90/129,869.85 = 72,801.80/x
  3. Step 3: Cross multiply
    86,579.90x = 129,869.85 × 72,801.80
  4. Step 4: Simplify right side
    86,579.90x = 9,454,758,845.73
  5. Step 5: Solve for x
    x = 9,454,758,845.73/86,579.90
  6. Step 6: Final answer
    x = 109,202.70

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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.