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Finding the Fourth Proportional to 74,781.60, 112,095.60 and 43,600.80

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Solution

The fourth proportional to 74,781.60, 112,095.60 and 43,600.80 is: 65,356.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,781.60 : 112,095.60 = 43,600.80 : x
  2. Step 2: Convert to fraction form
    74,781.60/112,095.60 = 43,600.80/x
  3. Step 3: Cross multiply
    74,781.60x = 112,095.60 × 43,600.80
  4. Step 4: Simplify right side
    74,781.60x = 4,887,457,836.48
  5. Step 5: Solve for x
    x = 4,887,457,836.48/74,781.60
  6. Step 6: Final answer
    x = 65,356.42

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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.