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Finding the Fourth Proportional to 84,823.80, 127,235.70 and 84,240.60

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Solution

The fourth proportional to 84,823.80, 127,235.70 and 84,240.60 is: 126,360.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,823.80 : 127,235.70 = 84,240.60 : x
  2. Step 2: Convert to fraction form
    84,823.80/127,235.70 = 84,240.60/x
  3. Step 3: Cross multiply
    84,823.80x = 127,235.70 × 84,240.60
  4. Step 4: Simplify right side
    84,823.80x = 10,718,411,709.42
  5. Step 5: Solve for x
    x = 10,718,411,709.42/84,823.80
  6. Step 6: Final answer
    x = 126,360.90

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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.