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Finding the Fourth Proportional to 69,612.95, 96,057.90 and 38,981.78

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Solution

The fourth proportional to 69,612.95, 96,057.90 and 38,981.78 is: 53,790.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,612.95 : 96,057.90 = 38,981.78 : x
  2. Step 2: Convert to fraction form
    69,612.95/96,057.90 = 38,981.78/x
  3. Step 3: Cross multiply
    69,612.95x = 96,057.90 × 38,981.78
  4. Step 4: Simplify right side
    69,612.95x = 3,744,507,467.29
  5. Step 5: Solve for x
    x = 3,744,507,467.29/69,612.95
  6. Step 6: Final answer
    x = 53,790.39

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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.