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Finding the Fourth Proportional to 343,079.16, 514,668.36 and 129,789.24

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Solution

The fourth proportional to 343,079.16, 514,668.36 and 129,789.24 is: 194,702.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,079.16 : 514,668.36 = 129,789.24 : x
  2. Step 2: Convert to fraction form
    343,079.16/514,668.36 = 129,789.24/x
  3. Step 3: Cross multiply
    343,079.16x = 514,668.36 × 129,789.24
  4. Step 4: Simplify right side
    343,079.16x = 66,798,415,296.45
  5. Step 5: Solve for x
    x = 66,798,415,296.45/343,079.16
  6. Step 6: Final answer
    x = 194,702.63

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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.