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Finding the Fourth Proportional to 61,383.80, 84,757.32 and 47,931.72

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Solution

The fourth proportional to 61,383.80, 84,757.32 and 47,931.72 is: 66,183.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,383.80 : 84,757.32 = 47,931.72 : x
  2. Step 2: Convert to fraction form
    61,383.80/84,757.32 = 47,931.72/x
  3. Step 3: Cross multiply
    61,383.80x = 84,757.32 × 47,931.72
  4. Step 4: Simplify right side
    61,383.80x = 4,062,564,130.19
  5. Step 5: Solve for x
    x = 4,062,564,130.19/61,383.80
  6. Step 6: Final answer
    x = 66,183.01

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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.