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Finding the Fourth Proportional to 124,847.60, 187,044.60 and 72,100.40

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Solution

The fourth proportional to 124,847.60, 187,044.60 and 72,100.40 is: 108,019.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,847.60 : 187,044.60 = 72,100.40 : x
  2. Step 2: Convert to fraction form
    124,847.60/187,044.60 = 72,100.40/x
  3. Step 3: Cross multiply
    124,847.60x = 187,044.60 × 72,100.40
  4. Step 4: Simplify right side
    124,847.60x = 13,485,990,477.84
  5. Step 5: Solve for x
    x = 13,485,990,477.84/124,847.60
  6. Step 6: Final answer
    x = 108,019.62

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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.