Home / 218,989.10-328,570.05-85,846.70

Finding the Fourth Proportional to 218,989.10, 328,570.05 and 85,846.70

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Solution

The fourth proportional to 218,989.10, 328,570.05 and 85,846.70 is: 128,803.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,989.10 : 328,570.05 = 85,846.70 : x
  2. Step 2: Convert to fraction form
    218,989.10/328,570.05 = 85,846.70/x
  3. Step 3: Cross multiply
    218,989.10x = 328,570.05 × 85,846.70
  4. Step 4: Simplify right side
    218,989.10x = 28,206,654,511.34
  5. Step 5: Solve for x
    x = 28,206,654,511.34/218,989.10
  6. Step 6: Final answer
    x = 128,803.92

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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.