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Finding the Fourth Proportional to 80,667.60, 121,037.40 and 28,114.80

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Solution

The fourth proportional to 80,667.60, 121,037.40 and 28,114.80 is: 42,184.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,667.60 : 121,037.40 = 28,114.80 : x
  2. Step 2: Convert to fraction form
    80,667.60/121,037.40 = 28,114.80/x
  3. Step 3: Cross multiply
    80,667.60x = 121,037.40 × 28,114.80
  4. Step 4: Simplify right side
    80,667.60x = 3,402,942,293.52
  5. Step 5: Solve for x
    x = 3,402,942,293.52/80,667.60
  6. Step 6: Final answer
    x = 42,184.75

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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.