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Finding the Fourth Proportional to 77,586.91, 107,081.52 and 47,389.61

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Solution

The fourth proportional to 77,586.91, 107,081.52 and 47,389.61 is: 65,404.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,586.91 : 107,081.52 = 47,389.61 : x
  2. Step 2: Convert to fraction form
    77,586.91/107,081.52 = 47,389.61/x
  3. Step 3: Cross multiply
    77,586.91x = 107,081.52 × 47,389.61
  4. Step 4: Simplify right side
    77,586.91x = 5,074,551,091.95
  5. Step 5: Solve for x
    x = 5,074,551,091.95/77,586.91
  6. Step 6: Final answer
    x = 65,404.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.