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Finding the Fourth Proportional to 74,659.20, 111,719.20 and 64,254.70

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Solution

The fourth proportional to 74,659.20, 111,719.20 and 64,254.70 is: 96,150.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,659.20 : 111,719.20 = 64,254.70 : x
  2. Step 2: Convert to fraction form
    74,659.20/111,719.20 = 64,254.70/x
  3. Step 3: Cross multiply
    74,659.20x = 111,719.20 × 64,254.70
  4. Step 4: Simplify right side
    74,659.20x = 7,178,483,680.24
  5. Step 5: Solve for x
    x = 7,178,483,680.24/74,659.20
  6. Step 6: Final answer
    x = 96,150.02

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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.