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Finding the Fourth Proportional to 128,442.42, 177,251.04 and 71,853.84

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Solution

The fourth proportional to 128,442.42, 177,251.04 and 71,853.84 is: 99,158.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,442.42 : 177,251.04 = 71,853.84 : x
  2. Step 2: Convert to fraction form
    128,442.42/177,251.04 = 71,853.84/x
  3. Step 3: Cross multiply
    128,442.42x = 177,251.04 × 71,853.84
  4. Step 4: Simplify right side
    128,442.42x = 12,736,167,867.99
  5. Step 5: Solve for x
    x = 12,736,167,867.99/128,442.42
  6. Step 6: Final answer
    x = 99,158.58

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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.