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Finding the Fourth Proportional to 71,586.16, 107,379.12 and 18,278.12

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Solution

The fourth proportional to 71,586.16, 107,379.12 and 18,278.12 is: 27,417.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,586.16 : 107,379.12 = 18,278.12 : x
  2. Step 2: Convert to fraction form
    71,586.16/107,379.12 = 18,278.12/x
  3. Step 3: Cross multiply
    71,586.16x = 107,379.12 × 18,278.12
  4. Step 4: Simplify right side
    71,586.16x = 1,962,688,440.85
  5. Step 5: Solve for x
    x = 1,962,688,440.85/71,586.16
  6. Step 6: Final answer
    x = 27,417.15

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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.