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Finding the Fourth Proportional to 143,710.90, 215,566.35 and 129,714.10

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Solution

The fourth proportional to 143,710.90, 215,566.35 and 129,714.10 is: 194,571.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,710.90 : 215,566.35 = 129,714.10 : x
  2. Step 2: Convert to fraction form
    143,710.90/215,566.35 = 129,714.10/x
  3. Step 3: Cross multiply
    143,710.90x = 215,566.35 × 129,714.10
  4. Step 4: Simplify right side
    143,710.90x = 27,961,995,080.54
  5. Step 5: Solve for x
    x = 27,961,995,080.54/143,710.90
  6. Step 6: Final answer
    x = 194,571.15

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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.