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Finding the Fourth Proportional to 99,985.24, 149,978.01 and 40,040.72

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Solution

The fourth proportional to 99,985.24, 149,978.01 and 40,040.72 is: 60,061.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,985.24 : 149,978.01 = 40,040.72 : x
  2. Step 2: Convert to fraction form
    99,985.24/149,978.01 = 40,040.72/x
  3. Step 3: Cross multiply
    99,985.24x = 149,978.01 × 40,040.72
  4. Step 4: Simplify right side
    99,985.24x = 6,005,227,504.57
  5. Step 5: Solve for x
    x = 6,005,227,504.57/99,985.24
  6. Step 6: Final answer
    x = 60,061.14

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.