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Finding the Fourth Proportional to 86,660.90, 129,908.30 and 36,672.21

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Solution

The fourth proportional to 86,660.90, 129,908.30 and 36,672.21 is: 54,973.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,660.90 : 129,908.30 = 36,672.21 : x
  2. Step 2: Convert to fraction form
    86,660.90/129,908.30 = 36,672.21/x
  3. Step 3: Cross multiply
    86,660.90x = 129,908.30 × 36,672.21
  4. Step 4: Simplify right side
    86,660.90x = 4,764,024,274.98
  5. Step 5: Solve for x
    x = 4,764,024,274.98/86,660.90
  6. Step 6: Final answer
    x = 54,973.17

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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.