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Finding the Fourth Proportional to 84,387.60, 126,518.22 and 28,195.07

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Solution

The fourth proportional to 84,387.60, 126,518.22 and 28,195.07 is: 42,271.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,387.60 : 126,518.22 = 28,195.07 : x
  2. Step 2: Convert to fraction form
    84,387.60/126,518.22 = 28,195.07/x
  3. Step 3: Cross multiply
    84,387.60x = 126,518.22 × 28,195.07
  4. Step 4: Simplify right side
    84,387.60x = 3,567,189,436.58
  5. Step 5: Solve for x
    x = 3,567,189,436.58/84,387.60
  6. Step 6: Final answer
    x = 42,271.49

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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.