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Finding the Fourth Proportional to 128,211.35, 176,904.24 and 74,468.55

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Solution

The fourth proportional to 128,211.35, 176,904.24 and 74,468.55 is: 102,750.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,211.35 : 176,904.24 = 74,468.55 : x
  2. Step 2: Convert to fraction form
    128,211.35/176,904.24 = 74,468.55/x
  3. Step 3: Cross multiply
    128,211.35x = 176,904.24 × 74,468.55
  4. Step 4: Simplify right side
    128,211.35x = 13,173,802,241.65
  5. Step 5: Solve for x
    x = 13,173,802,241.65/128,211.35
  6. Step 6: Final answer
    x = 102,750.68

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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.