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Finding the Fourth Proportional to 228,930.17, 315,955.91 and 126,978.31

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Solution

The fourth proportional to 228,930.17, 315,955.91 and 126,978.31 is: 175,247.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,930.17 : 315,955.91 = 126,978.31 : x
  2. Step 2: Convert to fraction form
    228,930.17/315,955.91 = 126,978.31/x
  3. Step 3: Cross multiply
    228,930.17x = 315,955.91 × 126,978.31
  4. Step 4: Simplify right side
    228,930.17x = 40,119,547,486.31
  5. Step 5: Solve for x
    x = 40,119,547,486.31/228,930.17
  6. Step 6: Final answer
    x = 175,247.97

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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.