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Finding the Fourth Proportional to 99,040.19, 148,570.70 and 28,919.70

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Solution

The fourth proportional to 99,040.19, 148,570.70 and 28,919.70 is: 43,382.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,040.19 : 148,570.70 = 28,919.70 : x
  2. Step 2: Convert to fraction form
    99,040.19/148,570.70 = 28,919.70/x
  3. Step 3: Cross multiply
    99,040.19x = 148,570.70 × 28,919.70
  4. Step 4: Simplify right side
    99,040.19x = 4,296,619,928.19
  5. Step 5: Solve for x
    x = 4,296,619,928.19/99,040.19
  6. Step 6: Final answer
    x = 43,382.59

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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.