Home / 81,432.54-122,117.22-28,114.83

Finding the Fourth Proportional to 81,432.54, 122,117.22 and 28,114.83

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Solution

The fourth proportional to 81,432.54, 122,117.22 and 28,114.83 is: 42,161.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,432.54 : 122,117.22 = 28,114.83 : x
  2. Step 2: Convert to fraction form
    81,432.54/122,117.22 = 28,114.83/x
  3. Step 3: Cross multiply
    81,432.54x = 122,117.22 × 28,114.83
  4. Step 4: Simplify right side
    81,432.54x = 3,433,304,880.37
  5. Step 5: Solve for x
    x = 3,433,304,880.37/81,432.54
  6. Step 6: Final answer
    x = 42,161.34

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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.