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Finding the Fourth Proportional to 74,019.78, 111,080.64 and 64,149.12

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Solution

The fourth proportional to 74,019.78, 111,080.64 and 64,149.12 is: 96,267.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,019.78 : 111,080.64 = 64,149.12 : x
  2. Step 2: Convert to fraction form
    74,019.78/111,080.64 = 64,149.12/x
  3. Step 3: Cross multiply
    74,019.78x = 111,080.64 × 64,149.12
  4. Step 4: Simplify right side
    74,019.78x = 7,125,725,305.04
  5. Step 5: Solve for x
    x = 7,125,725,305.04/74,019.78
  6. Step 6: Final answer
    x = 96,267.85

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1.5x scale

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.