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Finding the Fourth Proportional to 74,607.48, 102,965.76 and 55,711.80

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Solution

The fourth proportional to 74,607.48, 102,965.76 and 55,711.80 is: 76,887.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,607.48 : 102,965.76 = 55,711.80 : x
  2. Step 2: Convert to fraction form
    74,607.48/102,965.76 = 55,711.80/x
  3. Step 3: Cross multiply
    74,607.48x = 102,965.76 × 55,711.80
  4. Step 4: Simplify right side
    74,607.48x = 5,736,407,827.97
  5. Step 5: Solve for x
    x = 5,736,407,827.97/74,607.48
  6. Step 6: Final answer
    x = 76,887.84

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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.