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Finding the Fourth Proportional to 86,574.30, 129,861.45 and 27,428.10

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Solution

The fourth proportional to 86,574.30, 129,861.45 and 27,428.10 is: 41,142.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,574.30 : 129,861.45 = 27,428.10 : x
  2. Step 2: Convert to fraction form
    86,574.30/129,861.45 = 27,428.10/x
  3. Step 3: Cross multiply
    86,574.30x = 129,861.45 × 27,428.10
  4. Step 4: Simplify right side
    86,574.30x = 3,561,852,836.75
  5. Step 5: Solve for x
    x = 3,561,852,836.75/86,574.30
  6. Step 6: Final answer
    x = 41,142.15

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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.