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Finding the Fourth Proportional to 343,390.74, 515,015.96 and 130,085.10

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Solution

The fourth proportional to 343,390.74, 515,015.96 and 130,085.10 is: 195,101.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,390.74 : 515,015.96 = 130,085.10 : x
  2. Step 2: Convert to fraction form
    343,390.74/515,015.96 = 130,085.10/x
  3. Step 3: Cross multiply
    343,390.74x = 515,015.96 × 130,085.10
  4. Step 4: Simplify right side
    343,390.74x = 66,995,902,658.20
  5. Step 5: Solve for x
    x = 66,995,902,658.20/343,390.74
  6. Step 6: Final answer
    x = 195,101.08

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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.