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Finding the Fourth Proportional to 79,240, 109,351.20 and 47,410.24

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Solution

The fourth proportional to 79,240, 109,351.20 and 47,410.24 is: 65,426.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,240 : 109,351.20 = 47,410.24 : x
  2. Step 2: Convert to fraction form
    79,240/109,351.20 = 47,410.24/x
  3. Step 3: Cross multiply
    79,240x = 109,351.20 × 47,410.24
  4. Step 4: Simplify right side
    79,240x = 5,184,366,636.29
  5. Step 5: Solve for x
    x = 5,184,366,636.29/79,240
  6. Step 6: Final answer
    x = 65,426.13

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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.