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Finding the Fourth Proportional to 215,281.60, 322,807.20 and 90,481.60

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Solution

The fourth proportional to 215,281.60, 322,807.20 and 90,481.60 is: 135,673.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,281.60 : 322,807.20 = 90,481.60 : x
  2. Step 2: Convert to fraction form
    215,281.60/322,807.20 = 90,481.60/x
  3. Step 3: Cross multiply
    215,281.60x = 322,807.20 × 90,481.60
  4. Step 4: Simplify right side
    215,281.60x = 29,208,111,947.52
  5. Step 5: Solve for x
    x = 29,208,111,947.52/215,281.60
  6. Step 6: Final answer
    x = 135,673.98

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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.