Home / 219,011.57-328,376.09-85,905.28

Finding the Fourth Proportional to 219,011.57, 328,376.09 and 85,905.28

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Solution

The fourth proportional to 219,011.57, 328,376.09 and 85,905.28 is: 128,802.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,011.57 : 328,376.09 = 85,905.28 : x
  2. Step 2: Convert to fraction form
    219,011.57/328,376.09 = 85,905.28/x
  3. Step 3: Cross multiply
    219,011.57x = 328,376.09 × 85,905.28
  4. Step 4: Simplify right side
    219,011.57x = 28,209,239,350.58
  5. Step 5: Solve for x
    x = 28,209,239,350.58/219,011.57
  6. Step 6: Final answer
    x = 128,802.51

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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.