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Finding the Fourth Proportional to 155,958.48, 215,223.20 and 84,339

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Solution

The fourth proportional to 155,958.48, 215,223.20 and 84,339 is: 116,388.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,958.48 : 215,223.20 = 84,339 : x
  2. Step 2: Convert to fraction form
    155,958.48/215,223.20 = 84,339/x
  3. Step 3: Cross multiply
    155,958.48x = 215,223.20 × 84,339
  4. Step 4: Simplify right side
    155,958.48x = 18,151,709,043.11
  5. Step 5: Solve for x
    x = 18,151,709,043.11/155,958.48
  6. Step 6: Final answer
    x = 116,388.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.