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Finding the Fourth Proportional to 171,099.40, 256,476.30 and 77,672.20

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Solution

The fourth proportional to 171,099.40, 256,476.30 and 77,672.20 is: 116,429.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,099.40 : 256,476.30 = 77,672.20 : x
  2. Step 2: Convert to fraction form
    171,099.40/256,476.30 = 77,672.20/x
  3. Step 3: Cross multiply
    171,099.40x = 256,476.30 × 77,672.20
  4. Step 4: Simplify right side
    171,099.40x = 19,921,078,468.86
  5. Step 5: Solve for x
    x = 19,921,078,468.86/171,099.40
  6. Step 6: Final answer
    x = 116,429.86

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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.