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Finding the Fourth Proportional to 220,560.80, 330,950.64 and 87,438.11

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Solution

The fourth proportional to 220,560.80, 330,950.64 and 87,438.11 is: 131,200.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,560.80 : 330,950.64 = 87,438.11 : x
  2. Step 2: Convert to fraction form
    220,560.80/330,950.64 = 87,438.11/x
  3. Step 3: Cross multiply
    220,560.80x = 330,950.64 × 87,438.11
  4. Step 4: Simplify right side
    220,560.80x = 28,937,696,810.14
  5. Step 5: Solve for x
    x = 28,937,696,810.14/220,560.80
  6. Step 6: Final answer
    x = 131,200.55

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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.