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Finding the Fourth Proportional to 80,875.59, 121,309.74 and 30,979.20

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Solution

The fourth proportional to 80,875.59, 121,309.74 and 30,979.20 is: 46,467.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,875.59 : 121,309.74 = 30,979.20 : x
  2. Step 2: Convert to fraction form
    80,875.59/121,309.74 = 30,979.20/x
  3. Step 3: Cross multiply
    80,875.59x = 121,309.74 × 30,979.20
  4. Step 4: Simplify right side
    80,875.59x = 3,758,078,697.41
  5. Step 5: Solve for x
    x = 3,758,078,697.41/80,875.59
  6. Step 6: Final answer
    x = 46,467.40

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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.