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Finding the Fourth Proportional to 56,878.79, 78,496.40 and 32,687.54

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Solution

The fourth proportional to 56,878.79, 78,496.40 and 32,687.54 is: 45,110.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,878.79 : 78,496.40 = 32,687.54 : x
  2. Step 2: Convert to fraction form
    56,878.79/78,496.40 = 32,687.54/x
  3. Step 3: Cross multiply
    56,878.79x = 78,496.40 × 32,687.54
  4. Step 4: Simplify right side
    56,878.79x = 2,565,853,904.09
  5. Step 5: Solve for x
    x = 2,565,853,904.09/56,878.79
  6. Step 6: Final answer
    x = 45,110.91

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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.