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Finding the Fourth Proportional to 81,792.71, 122,689.08 and 25,632.80

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Solution

The fourth proportional to 81,792.71, 122,689.08 and 25,632.80 is: 38,449.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,792.71 : 122,689.08 = 25,632.80 : x
  2. Step 2: Convert to fraction form
    81,792.71/122,689.08 = 25,632.80/x
  3. Step 3: Cross multiply
    81,792.71x = 122,689.08 × 25,632.80
  4. Step 4: Simplify right side
    81,792.71x = 3,144,864,649.82
  5. Step 5: Solve for x
    x = 3,144,864,649.82/81,792.71
  6. Step 6: Final answer
    x = 38,449.20

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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.