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Finding the Fourth Proportional to 79,078.30, 109,117.28 and 47,240.44

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Solution

The fourth proportional to 79,078.30, 109,117.28 and 47,240.44 is: 65,185.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,078.30 : 109,117.28 = 47,240.44 : x
  2. Step 2: Convert to fraction form
    79,078.30/109,117.28 = 47,240.44/x
  3. Step 3: Cross multiply
    79,078.30x = 109,117.28 × 47,240.44
  4. Step 4: Simplify right side
    79,078.30x = 5,154,748,164.11
  5. Step 5: Solve for x
    x = 5,154,748,164.11/79,078.30
  6. Step 6: Final answer
    x = 65,185.37

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1.5x scale

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.