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Finding the Fourth Proportional to 478,087.20, 717,131.28 and 123,102

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Solution

The fourth proportional to 478,087.20, 717,131.28 and 123,102 is: 184,653.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,087.20 : 717,131.28 = 123,102 : x
  2. Step 2: Convert to fraction form
    478,087.20/717,131.28 = 123,102/x
  3. Step 3: Cross multiply
    478,087.20x = 717,131.28 × 123,102
  4. Step 4: Simplify right side
    478,087.20x = 88,280,294,830.56
  5. Step 5: Solve for x
    x = 88,280,294,830.56/478,087.20
  6. Step 6: Final answer
    x = 184,653.12

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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.