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Finding the Fourth Proportional to 257,148.21, 385,691.60 and 67,623.34

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Solution

The fourth proportional to 257,148.21, 385,691.60 and 67,623.34 is: 101,426.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,148.21 : 385,691.60 = 67,623.34 : x
  2. Step 2: Convert to fraction form
    257,148.21/385,691.60 = 67,623.34/x
  3. Step 3: Cross multiply
    257,148.21x = 385,691.60 × 67,623.34
  4. Step 4: Simplify right side
    257,148.21x = 26,081,755,852.18
  5. Step 5: Solve for x
    x = 26,081,755,852.18/257,148.21
  6. Step 6: Final answer
    x = 101,426.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.