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Finding the Fourth Proportional to 170,951.16, 256,221.84 and 79,643.40

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Solution

The fourth proportional to 170,951.16, 256,221.84 and 79,643.40 is: 119,369.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,951.16 : 256,221.84 = 79,643.40 : x
  2. Step 2: Convert to fraction form
    170,951.16/256,221.84 = 79,643.40/x
  3. Step 3: Cross multiply
    170,951.16x = 256,221.84 × 79,643.40
  4. Step 4: Simplify right side
    170,951.16x = 20,406,378,491.86
  5. Step 5: Solve for x
    x = 20,406,378,491.86/170,951.16
  6. Step 6: Final answer
    x = 119,369.64

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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.