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Finding the Fourth Proportional to 81,451.96, 112,392.30 and 45,639.16

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Solution

The fourth proportional to 81,451.96, 112,392.30 and 45,639.16 is: 62,975.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,451.96 : 112,392.30 = 45,639.16 : x
  2. Step 2: Convert to fraction form
    81,451.96/112,392.30 = 45,639.16/x
  3. Step 3: Cross multiply
    81,451.96x = 112,392.30 × 45,639.16
  4. Step 4: Simplify right side
    81,451.96x = 5,129,490,162.47
  5. Step 5: Solve for x
    x = 5,129,490,162.47/81,451.96
  6. Step 6: Final answer
    x = 62,975.65

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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.