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Finding the Fourth Proportional to 99,999.88, 149,999.60 and 40,055.28

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Solution

The fourth proportional to 99,999.88, 149,999.60 and 40,055.28 is: 60,082.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,999.88 : 149,999.60 = 40,055.28 : x
  2. Step 2: Convert to fraction form
    99,999.88/149,999.60 = 40,055.28/x
  3. Step 3: Cross multiply
    99,999.88x = 149,999.60 × 40,055.28
  4. Step 4: Simplify right side
    99,999.88x = 6,008,275,977.89
  5. Step 5: Solve for x
    x = 6,008,275,977.89/99,999.88
  6. Step 6: Final answer
    x = 60,082.83

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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.