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Finding the Fourth Proportional to 220,335.40, 330,438.30 and 87,171.40

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Solution

The fourth proportional to 220,335.40, 330,438.30 and 87,171.40 is: 130,731.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,335.40 : 330,438.30 = 87,171.40 : x
  2. Step 2: Convert to fraction form
    220,335.40/330,438.30 = 87,171.40/x
  3. Step 3: Cross multiply
    220,335.40x = 330,438.30 × 87,171.40
  4. Step 4: Simplify right side
    220,335.40x = 28,804,769,224.62
  5. Step 5: Solve for x
    x = 28,804,769,224.62/220,335.40
  6. Step 6: Final answer
    x = 130,731.46

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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.