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Finding the Fourth Proportional to 124,984.60, 172,478.10 and 68,396.92

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Solution

The fourth proportional to 124,984.60, 172,478.10 and 68,396.92 is: 94,387.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,984.60 : 172,478.10 = 68,396.92 : x
  2. Step 2: Convert to fraction form
    124,984.60/172,478.10 = 68,396.92/x
  3. Step 3: Cross multiply
    124,984.60x = 172,478.10 × 68,396.92
  4. Step 4: Simplify right side
    124,984.60x = 11,796,970,807.45
  5. Step 5: Solve for x
    x = 11,796,970,807.45/124,984.60
  6. Step 6: Final answer
    x = 94,387.39

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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.