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Finding the Fourth Proportional to 170,748.72, 256,150.80 and 64,140.90

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Solution

The fourth proportional to 170,748.72, 256,150.80 and 64,140.90 is: 96,221.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,748.72 : 256,150.80 = 64,140.90 : x
  2. Step 2: Convert to fraction form
    170,748.72/256,150.80 = 64,140.90/x
  3. Step 3: Cross multiply
    170,748.72x = 256,150.80 × 64,140.90
  4. Step 4: Simplify right side
    170,748.72x = 16,429,742,847.72
  5. Step 5: Solve for x
    x = 16,429,742,847.72/170,748.72
  6. Step 6: Final answer
    x = 96,221.76

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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.