Home / 221,076.66-331,685.08-78,918.89

Finding the Fourth Proportional to 221,076.66, 331,685.08 and 78,918.89

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Solution

The fourth proportional to 221,076.66, 331,685.08 and 78,918.89 is: 118,403.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,076.66 : 331,685.08 = 78,918.89 : x
  2. Step 2: Convert to fraction form
    221,076.66/331,685.08 = 78,918.89/x
  3. Step 3: Cross multiply
    221,076.66x = 331,685.08 × 78,918.89
  4. Step 4: Simplify right side
    221,076.66x = 26,176,216,487.44
  5. Step 5: Solve for x
    x = 26,176,216,487.44/221,076.66
  6. Step 6: Final answer
    x = 118,403.35

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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.