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Finding the Fourth Proportional to 84,830.90, 127,246.35 and 80,456.90

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Solution

The fourth proportional to 84,830.90, 127,246.35 and 80,456.90 is: 120,685.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,830.90 : 127,246.35 = 80,456.90 : x
  2. Step 2: Convert to fraction form
    84,830.90/127,246.35 = 80,456.90/x
  3. Step 3: Cross multiply
    84,830.90x = 127,246.35 × 80,456.90
  4. Step 4: Simplify right side
    84,830.90x = 10,237,846,857.32
  5. Step 5: Solve for x
    x = 10,237,846,857.32/84,830.90
  6. Step 6: Final answer
    x = 120,685.35

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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.