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Finding the Fourth Proportional to 340,115.79, 510,173.69 and 123,990.74

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Solution

The fourth proportional to 340,115.79, 510,173.69 and 123,990.74 is: 185,986.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,115.79 : 510,173.69 = 123,990.74 : x
  2. Step 2: Convert to fraction form
    340,115.79/510,173.69 = 123,990.74/x
  3. Step 3: Cross multiply
    340,115.79x = 510,173.69 × 123,990.74
  4. Step 4: Simplify right side
    340,115.79x = 63,256,812,791.41
  5. Step 5: Solve for x
    x = 63,256,812,791.41/340,115.79
  6. Step 6: Final answer
    x = 185,986.11

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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.