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Finding the Fourth Proportional to 257,277.08, 385,880.59 and 67,721.57

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Solution

The fourth proportional to 257,277.08, 385,880.59 and 67,721.57 is: 101,573.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,277.08 : 385,880.59 = 67,721.57 : x
  2. Step 2: Convert to fraction form
    257,277.08/385,880.59 = 67,721.57/x
  3. Step 3: Cross multiply
    257,277.08x = 385,880.59 × 67,721.57
  4. Step 4: Simplify right side
    257,277.08x = 26,132,441,160.21
  5. Step 5: Solve for x
    x = 26,132,441,160.21/257,277.08
  6. Step 6: Final answer
    x = 101,573.14

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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.