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Finding the Fourth Proportional to 124,468.49, 171,740.75 and 72,775.64

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Solution

The fourth proportional to 124,468.49, 171,740.75 and 72,775.64 is: 100,415.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,468.49 : 171,740.75 = 72,775.64 : x
  2. Step 2: Convert to fraction form
    124,468.49/171,740.75 = 72,775.64/x
  3. Step 3: Cross multiply
    124,468.49x = 171,740.75 × 72,775.64
  4. Step 4: Simplify right side
    124,468.49x = 12,498,541,772.75
  5. Step 5: Solve for x
    x = 12,498,541,772.75/124,468.49
  6. Step 6: Final answer
    x = 100,415.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.