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Finding the Fourth Proportional to 72,017.76, 99,368.64 and 41,785.56

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Solution

The fourth proportional to 72,017.76, 99,368.64 and 41,785.56 is: 57,654.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,017.76 : 99,368.64 = 41,785.56 : x
  2. Step 2: Convert to fraction form
    72,017.76/99,368.64 = 41,785.56/x
  3. Step 3: Cross multiply
    72,017.76x = 99,368.64 × 41,785.56
  4. Step 4: Simplify right side
    72,017.76x = 4,152,174,268.84
  5. Step 5: Solve for x
    x = 4,152,174,268.84/72,017.76
  6. Step 6: Final answer
    x = 57,654.87

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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.