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Finding the Fourth Proportional to 220,334.40, 330,436.80 and 87,170.40

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Solution

The fourth proportional to 220,334.40, 330,436.80 and 87,170.40 is: 130,729.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,334.40 : 330,436.80 = 87,170.40 : x
  2. Step 2: Convert to fraction form
    220,334.40/330,436.80 = 87,170.40/x
  3. Step 3: Cross multiply
    220,334.40x = 330,436.80 × 87,170.40
  4. Step 4: Simplify right side
    220,334.40x = 28,804,308,030.72
  5. Step 5: Solve for x
    x = 28,804,308,030.72/220,334.40
  6. Step 6: Final answer
    x = 130,729.96

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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.