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Finding the Fourth Proportional to 99,999.61, 149,999.42 and 40,055.31

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Solution

The fourth proportional to 99,999.61, 149,999.42 and 40,055.31 is: 60,082.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,999.61 : 149,999.42 = 40,055.31 : x
  2. Step 2: Convert to fraction form
    99,999.61/149,999.42 = 40,055.31/x
  3. Step 3: Cross multiply
    99,999.61x = 149,999.42 × 40,055.31
  4. Step 4: Simplify right side
    99,999.61x = 6,008,273,368.06
  5. Step 5: Solve for x
    x = 6,008,273,368.06/99,999.61
  6. Step 6: Final answer
    x = 60,082.97

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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.