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Finding the Fourth Proportional to 79,020.64, 109,044.64 and 45,037.12

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Solution

The fourth proportional to 79,020.64, 109,044.64 and 45,037.12 is: 62,149.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,020.64 : 109,044.64 = 45,037.12 : x
  2. Step 2: Convert to fraction form
    79,020.64/109,044.64 = 45,037.12/x
  3. Step 3: Cross multiply
    79,020.64x = 109,044.64 × 45,037.12
  4. Step 4: Simplify right side
    79,020.64x = 4,911,056,537.04
  5. Step 5: Solve for x
    x = 4,911,056,537.04/79,020.64
  6. Step 6: Final answer
    x = 62,149.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.