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Finding the Fourth Proportional to 243,579.84, 365,371.68 and 85,772.16

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Solution

The fourth proportional to 243,579.84, 365,371.68 and 85,772.16 is: 128,658.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    243,579.84 : 365,371.68 = 85,772.16 : x
  2. Step 2: Convert to fraction form
    243,579.84/365,371.68 = 85,772.16/x
  3. Step 3: Cross multiply
    243,579.84x = 365,371.68 × 85,772.16
  4. Step 4: Simplify right side
    243,579.84x = 31,338,718,196.43
  5. Step 5: Solve for x
    x = 31,338,718,196.43/243,579.84
  6. Step 6: Final answer
    x = 128,658.92

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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.