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Finding the Fourth Proportional to 219,043.57, 328,424.09 and 85,937.28

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Solution

The fourth proportional to 219,043.57, 328,424.09 and 85,937.28 is: 128,850.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,043.57 : 328,424.09 = 85,937.28 : x
  2. Step 2: Convert to fraction form
    219,043.57/328,424.09 = 85,937.28/x
  3. Step 3: Cross multiply
    219,043.57x = 328,424.09 × 85,937.28
  4. Step 4: Simplify right side
    219,043.57x = 28,223,872,981.08
  5. Step 5: Solve for x
    x = 28,223,872,981.08/219,043.57
  6. Step 6: Final answer
    x = 128,850.50

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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.