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Finding the Fourth Proportional to 228,956.14, 315,959.28 and 128,354.14

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Solution

The fourth proportional to 228,956.14, 315,959.28 and 128,354.14 is: 177,128.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,956.14 : 315,959.28 = 128,354.14 : x
  2. Step 2: Convert to fraction form
    228,956.14/315,959.28 = 128,354.14/x
  3. Step 3: Cross multiply
    228,956.14x = 315,959.28 × 128,354.14
  4. Step 4: Simplify right side
    228,956.14x = 40,554,681,659.42
  5. Step 5: Solve for x
    x = 40,554,681,659.42/228,956.14
  6. Step 6: Final answer
    x = 177,128.60

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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.