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Finding the Fourth Proportional to 99,722.79, 137,630.70 and 63,427.62

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Solution

The fourth proportional to 99,722.79, 137,630.70 and 63,427.62 is: 87,538.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,722.79 : 137,630.70 = 63,427.62 : x
  2. Step 2: Convert to fraction form
    99,722.79/137,630.70 = 63,427.62/x
  3. Step 3: Cross multiply
    99,722.79x = 137,630.70 × 63,427.62
  4. Step 4: Simplify right side
    99,722.79x = 8,729,587,739.93
  5. Step 5: Solve for x
    x = 8,729,587,739.93/99,722.79
  6. Step 6: Final answer
    x = 87,538.54

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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.