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Finding the Fourth Proportional to 220,666.95, 330,909.71 and 87,528.87

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Solution

The fourth proportional to 220,666.95, 330,909.71 and 87,528.87 is: 131,257.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,666.95 : 330,909.71 = 87,528.87 : x
  2. Step 2: Convert to fraction form
    220,666.95/330,909.71 = 87,528.87/x
  3. Step 3: Cross multiply
    220,666.95x = 330,909.71 × 87,528.87
  4. Step 4: Simplify right side
    220,666.95x = 28,964,152,550.68
  5. Step 5: Solve for x
    x = 28,964,152,550.68/220,666.95
  6. Step 6: Final answer
    x = 131,257.32

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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.