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Finding the Fourth Proportional to 86,172.84, 129,260.88 and 27,007.20

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Solution

The fourth proportional to 86,172.84, 129,260.88 and 27,007.20 is: 40,511.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,172.84 : 129,260.88 = 27,007.20 : x
  2. Step 2: Convert to fraction form
    86,172.84/129,260.88 = 27,007.20/x
  3. Step 3: Cross multiply
    86,172.84x = 129,260.88 × 27,007.20
  4. Step 4: Simplify right side
    86,172.84x = 3,490,974,438.34
  5. Step 5: Solve for x
    x = 3,490,974,438.34/86,172.84
  6. Step 6: Final answer
    x = 40,511.31

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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.