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Finding the Fourth Proportional to 287,103.53, 430,655.43 and 129,147.44

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Solution

The fourth proportional to 287,103.53, 430,655.43 and 129,147.44 is: 193,721.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,103.53 : 430,655.43 = 129,147.44 : x
  2. Step 2: Convert to fraction form
    287,103.53/430,655.43 = 129,147.44/x
  3. Step 3: Cross multiply
    287,103.53x = 430,655.43 × 129,147.44
  4. Step 4: Simplify right side
    287,103.53x = 55,618,046,306.60
  5. Step 5: Solve for x
    x = 55,618,046,306.60/287,103.53
  6. Step 6: Final answer
    x = 193,721.22

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1.5x scale

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.