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Finding the Fourth Proportional to 122,947.80, 184,421.70 and 80,957.40

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Solution

The fourth proportional to 122,947.80, 184,421.70 and 80,957.40 is: 121,436.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,947.80 : 184,421.70 = 80,957.40 : x
  2. Step 2: Convert to fraction form
    122,947.80/184,421.70 = 80,957.40/x
  3. Step 3: Cross multiply
    122,947.80x = 184,421.70 × 80,957.40
  4. Step 4: Simplify right side
    122,947.80x = 14,930,301,335.58
  5. Step 5: Solve for x
    x = 14,930,301,335.58/122,947.80
  6. Step 6: Final answer
    x = 121,436.10

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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.