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Finding the Fourth Proportional to 57,904.40, 86,856.60 and 54,405.20

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Solution

The fourth proportional to 57,904.40, 86,856.60 and 54,405.20 is: 81,607.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,904.40 : 86,856.60 = 54,405.20 : x
  2. Step 2: Convert to fraction form
    57,904.40/86,856.60 = 54,405.20/x
  3. Step 3: Cross multiply
    57,904.40x = 86,856.60 × 54,405.20
  4. Step 4: Simplify right side
    57,904.40x = 4,725,450,694.32
  5. Step 5: Solve for x
    x = 4,725,450,694.32/57,904.40
  6. Step 6: Final answer
    x = 81,607.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.