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Finding the Fourth Proportional to 74,139.03, 111,319.52 and 64,174.68

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Solution

The fourth proportional to 74,139.03, 111,319.52 and 64,174.68 is: 96,358.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,139.03 : 111,319.52 = 64,174.68 : x
  2. Step 2: Convert to fraction form
    74,139.03/111,319.52 = 64,174.68/x
  3. Step 3: Cross multiply
    74,139.03x = 111,319.52 × 64,174.68
  4. Step 4: Simplify right side
    74,139.03x = 7,143,894,252.88
  5. Step 5: Solve for x
    x = 7,143,894,252.88/74,139.03
  6. Step 6: Final answer
    x = 96,358.08

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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.