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Finding the Fourth Proportional to 89,873.10, 134,809.65 and 72,377.10

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Solution

The fourth proportional to 89,873.10, 134,809.65 and 72,377.10 is: 108,565.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,873.10 : 134,809.65 = 72,377.10 : x
  2. Step 2: Convert to fraction form
    89,873.10/134,809.65 = 72,377.10/x
  3. Step 3: Cross multiply
    89,873.10x = 134,809.65 × 72,377.10
  4. Step 4: Simplify right side
    89,873.10x = 9,757,131,519.02
  5. Step 5: Solve for x
    x = 9,757,131,519.02/89,873.10
  6. Step 6: Final answer
    x = 108,565.65

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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.