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Finding the Fourth Proportional to 83,630.72, 115,371.60 and 53,400.62

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Solution

The fourth proportional to 83,630.72, 115,371.60 and 53,400.62 is: 73,668.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,630.72 : 115,371.60 = 53,400.62 : x
  2. Step 2: Convert to fraction form
    83,630.72/115,371.60 = 53,400.62/x
  3. Step 3: Cross multiply
    83,630.72x = 115,371.60 × 53,400.62
  4. Step 4: Simplify right side
    83,630.72x = 6,160,914,970.39
  5. Step 5: Solve for x
    x = 6,160,914,970.39/83,630.72
  6. Step 6: Final answer
    x = 73,668.08

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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.