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Finding the Fourth Proportional to 71,693.10, 107,551.80 and 21,772.80

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Solution

The fourth proportional to 71,693.10, 107,551.80 and 21,772.80 is: 32,662.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,693.10 : 107,551.80 = 21,772.80 : x
  2. Step 2: Convert to fraction form
    71,693.10/107,551.80 = 21,772.80/x
  3. Step 3: Cross multiply
    71,693.10x = 107,551.80 × 21,772.80
  4. Step 4: Simplify right side
    71,693.10x = 2,341,703,831.04
  5. Step 5: Solve for x
    x = 2,341,703,831.04/71,693.10
  6. Step 6: Final answer
    x = 32,662.89

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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.