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

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Solution

The fourth proportional to 86,579.90, 129,869.85 and 86,579.90 is: 129,869.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,579.90 : 129,869.85 = 86,579.90 : x
  2. Step 2: Convert to fraction form
    86,579.90/129,869.85 = 86,579.90/x
  3. Step 3: Cross multiply
    86,579.90x = 129,869.85 × 86,579.90
  4. Step 4: Simplify right side
    86,579.90x = 11,244,118,626.02
  5. Step 5: Solve for x
    x = 11,244,118,626.02/86,579.90
  6. Step 6: Final answer
    x = 129,869.85

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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.