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Finding the Fourth Proportional to 86,172.79, 129,258.99 and 41,057.20

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Solution

The fourth proportional to 86,172.79, 129,258.99 and 41,057.20 is: 61,585.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,172.79 : 129,258.99 = 41,057.20 : x
  2. Step 2: Convert to fraction form
    86,172.79/129,258.99 = 41,057.20/x
  3. Step 3: Cross multiply
    86,172.79x = 129,258.99 × 41,057.20
  4. Step 4: Simplify right side
    86,172.79x = 5,307,011,886.79
  5. Step 5: Solve for x
    x = 5,307,011,886.79/86,172.79
  6. Step 6: Final answer
    x = 61,585.71

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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.