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Finding the Fourth Proportional to 99,809.20, 149,713.80 and 91,644.40

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Solution

The fourth proportional to 99,809.20, 149,713.80 and 91,644.40 is: 137,466.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,809.20 : 149,713.80 = 91,644.40 : x
  2. Step 2: Convert to fraction form
    99,809.20/149,713.80 = 91,644.40/x
  3. Step 3: Cross multiply
    99,809.20x = 149,713.80 × 91,644.40
  4. Step 4: Simplify right side
    99,809.20x = 13,720,431,372.72
  5. Step 5: Solve for x
    x = 13,720,431,372.72/99,809.20
  6. Step 6: Final answer
    x = 137,466.60

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1.5x scale

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.