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Finding the Fourth Proportional to 86,579.35, 129,869.03 and 86,579.35

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Solution

The fourth proportional to 86,579.35, 129,869.03 and 86,579.35 is: 129,869.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,579.35 : 129,869.03 = 86,579.35 : x
  2. Step 2: Convert to fraction form
    86,579.35/129,869.03 = 86,579.35/x
  3. Step 3: Cross multiply
    86,579.35x = 129,869.03 × 86,579.35
  4. Step 4: Simplify right side
    86,579.35x = 11,243,975,769.63
  5. Step 5: Solve for x
    x = 11,243,975,769.63/86,579.35
  6. Step 6: Final answer
    x = 129,869.03

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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.