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Finding the Fourth Proportional to 80,645.48, 120,970.94 and 28,055.40

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Solution

The fourth proportional to 80,645.48, 120,970.94 and 28,055.40 is: 42,084.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,645.48 : 120,970.94 = 28,055.40 : x
  2. Step 2: Convert to fraction form
    80,645.48/120,970.94 = 28,055.40/x
  3. Step 3: Cross multiply
    80,645.48x = 120,970.94 × 28,055.40
  4. Step 4: Simplify right side
    80,645.48x = 3,393,888,110.08
  5. Step 5: Solve for x
    x = 3,393,888,110.08/80,645.48
  6. Step 6: Final answer
    x = 42,084.05

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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.