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Finding the Fourth Proportional to 80,898.94, 121,403.09 and 28,308.88

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Solution

The fourth proportional to 80,898.94, 121,403.09 and 28,308.88 is: 42,482.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,898.94 : 121,403.09 = 28,308.88 : x
  2. Step 2: Convert to fraction form
    80,898.94/121,403.09 = 28,308.88/x
  3. Step 3: Cross multiply
    80,898.94x = 121,403.09 × 28,308.88
  4. Step 4: Simplify right side
    80,898.94x = 3,436,785,364.89
  5. Step 5: Solve for x
    x = 3,436,785,364.89/80,898.94
  6. Step 6: Final answer
    x = 42,482.45

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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.