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Finding the Fourth Proportional to 155,871.53, 215,102.58 and 84,251.55

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Solution

The fourth proportional to 155,871.53, 215,102.58 and 84,251.55 is: 116,267.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,871.53 : 215,102.58 = 84,251.55 : x
  2. Step 2: Convert to fraction form
    155,871.53/215,102.58 = 84,251.55/x
  3. Step 3: Cross multiply
    155,871.53x = 215,102.58 × 84,251.55
  4. Step 4: Simplify right side
    155,871.53x = 18,122,725,774.00
  5. Step 5: Solve for x
    x = 18,122,725,774.00/155,871.53
  6. Step 6: Final answer
    x = 116,267.07

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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.