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Finding the Fourth Proportional to 345,099.78, 517,737.15 and 131,867.82

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Solution

The fourth proportional to 345,099.78, 517,737.15 and 131,867.82 is: 197,835.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,099.78 : 517,737.15 = 131,867.82 : x
  2. Step 2: Convert to fraction form
    345,099.78/517,737.15 = 131,867.82/x
  3. Step 3: Cross multiply
    345,099.78x = 517,737.15 × 131,867.82
  4. Step 4: Simplify right side
    345,099.78x = 68,272,869,303.51
  5. Step 5: Solve for x
    x = 68,272,869,303.51/345,099.78
  6. Step 6: Final answer
    x = 197,835.16

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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.