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Finding the Fourth Proportional to 56,894.64, 78,489.60 and 54,259.44

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Solution

The fourth proportional to 56,894.64, 78,489.60 and 54,259.44 is: 74,854.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,894.64 : 78,489.60 = 54,259.44 : x
  2. Step 2: Convert to fraction form
    56,894.64/78,489.60 = 54,259.44/x
  3. Step 3: Cross multiply
    56,894.64x = 78,489.60 × 54,259.44
  4. Step 4: Simplify right side
    56,894.64x = 4,258,801,741.82
  5. Step 5: Solve for x
    x = 4,258,801,741.82/56,894.64
  6. Step 6: Final answer
    x = 74,854.18

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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.