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Finding the Fourth Proportional to 79,589.20, 109,769.16 and 70,008.40

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Solution

The fourth proportional to 79,589.20, 109,769.16 and 70,008.40 is: 96,555.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,589.20 : 109,769.16 = 70,008.40 : x
  2. Step 2: Convert to fraction form
    79,589.20/109,769.16 = 70,008.40/x
  3. Step 3: Cross multiply
    79,589.20x = 109,769.16 × 70,008.40
  4. Step 4: Simplify right side
    79,589.20x = 7,684,763,260.94
  5. Step 5: Solve for x
    x = 7,684,763,260.94/79,589.20
  6. Step 6: Final answer
    x = 96,555.35

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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.