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Finding the Fourth Proportional to 84,856.90, 127,285.35 and 84,856.90

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Solution

The fourth proportional to 84,856.90, 127,285.35 and 84,856.90 is: 127,285.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,856.90 : 127,285.35 = 84,856.90 : x
  2. Step 2: Convert to fraction form
    84,856.90/127,285.35 = 84,856.90/x
  3. Step 3: Cross multiply
    84,856.90x = 127,285.35 × 84,856.90
  4. Step 4: Simplify right side
    84,856.90x = 10,801,040,216.42
  5. Step 5: Solve for x
    x = 10,801,040,216.42/84,856.90
  6. Step 6: Final answer
    x = 127,285.35

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Double scale
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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.