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Finding the Fourth Proportional to 75,152.70, 112,729.05 and 73,986.30

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Solution

The fourth proportional to 75,152.70, 112,729.05 and 73,986.30 is: 110,979.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,152.70 : 112,729.05 = 73,986.30 : x
  2. Step 2: Convert to fraction form
    75,152.70/112,729.05 = 73,986.30/x
  3. Step 3: Cross multiply
    75,152.70x = 112,729.05 × 73,986.30
  4. Step 4: Simplify right side
    75,152.70x = 8,340,405,312.02
  5. Step 5: Solve for x
    x = 8,340,405,312.02/75,152.70
  6. Step 6: Final answer
    x = 110,979.45

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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.