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Finding the Fourth Proportional to 315,139.80, 434,876.94 and 171,898.68

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Solution

The fourth proportional to 315,139.80, 434,876.94 and 171,898.68 is: 237,211.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,139.80 : 434,876.94 = 171,898.68 : x
  2. Step 2: Convert to fraction form
    315,139.80/434,876.94 = 171,898.68/x
  3. Step 3: Cross multiply
    315,139.80x = 434,876.94 × 171,898.68
  4. Step 4: Simplify right side
    315,139.80x = 74,754,771,948.44
  5. Step 5: Solve for x
    x = 74,754,771,948.44/315,139.80
  6. Step 6: Final answer
    x = 237,211.46

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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.