Home / 219,029.52-328,543.32-85,815.70

Finding the Fourth Proportional to 219,029.52, 328,543.32 and 85,815.70

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Solution

The fourth proportional to 219,029.52, 328,543.32 and 85,815.70 is: 128,723.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,029.52 : 328,543.32 = 85,815.70 : x
  2. Step 2: Convert to fraction form
    219,029.52/328,543.32 = 85,815.70/x
  3. Step 3: Cross multiply
    219,029.52x = 328,543.32 × 85,815.70
  4. Step 4: Simplify right side
    219,029.52x = 28,194,174,986.12
  5. Step 5: Solve for x
    x = 28,194,174,986.12/219,029.52
  6. Step 6: Final answer
    x = 128,723.17

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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.