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Finding the Fourth Proportional to 219,018.64, 328,530.59 and 85,961.56

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Solution

The fourth proportional to 219,018.64, 328,530.59 and 85,961.56 is: 128,943.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,018.64 : 328,530.59 = 85,961.56 : x
  2. Step 2: Convert to fraction form
    219,018.64/328,530.59 = 85,961.56/x
  3. Step 3: Cross multiply
    219,018.64x = 328,530.59 × 85,961.56
  4. Step 4: Simplify right side
    219,018.64x = 28,241,002,024.12
  5. Step 5: Solve for x
    x = 28,241,002,024.12/219,018.64
  6. Step 6: Final answer
    x = 128,943.37

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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.