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Finding the Fourth Proportional to 84,392.80, 126,502.80 and 49,314.40

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Solution

The fourth proportional to 84,392.80, 126,502.80 and 49,314.40 is: 73,921.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,392.80 : 126,502.80 = 49,314.40 : x
  2. Step 2: Convert to fraction form
    84,392.80/126,502.80 = 49,314.40/x
  3. Step 3: Cross multiply
    84,392.80x = 126,502.80 × 49,314.40
  4. Step 4: Simplify right side
    84,392.80x = 6,238,409,680.32
  5. Step 5: Solve for x
    x = 6,238,409,680.32/84,392.80
  6. Step 6: Final answer
    x = 73,921.11

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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.