Home / 99,699.20-149,548.80-71,705.60

Finding the Fourth Proportional to 99,699.20, 149,548.80 and 71,705.60

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Solution

The fourth proportional to 99,699.20, 149,548.80 and 71,705.60 is: 107,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,699.20 : 149,548.80 = 71,705.60 : x
  2. Step 2: Convert to fraction form
    99,699.20/149,548.80 = 71,705.60/x
  3. Step 3: Cross multiply
    99,699.20x = 149,548.80 × 71,705.60
  4. Step 4: Simplify right side
    99,699.20x = 10,723,486,433.28
  5. Step 5: Solve for x
    x = 10,723,486,433.28/99,699.20
  6. Step 6: Final answer
    x = 107,558.40

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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.