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Finding the Fourth Proportional to 219,322.37, 328,981.87 and 89,490.66

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Solution

The fourth proportional to 219,322.37, 328,981.87 and 89,490.66 is: 134,235.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,322.37 : 328,981.87 = 89,490.66 : x
  2. Step 2: Convert to fraction form
    219,322.37/328,981.87 = 89,490.66/x
  3. Step 3: Cross multiply
    219,322.37x = 328,981.87 × 89,490.66
  4. Step 4: Simplify right side
    219,322.37x = 29,440,804,674.33
  5. Step 5: Solve for x
    x = 29,440,804,674.33/219,322.37
  6. Step 6: Final answer
    x = 134,235.30

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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.