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Finding the Fourth Proportional to 53,904.40, 81,002.40 and 47,489.20

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Solution

The fourth proportional to 53,904.40, 81,002.40 and 47,489.20 is: 71,362.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,904.40 : 81,002.40 = 47,489.20 : x
  2. Step 2: Convert to fraction form
    53,904.40/81,002.40 = 47,489.20/x
  3. Step 3: Cross multiply
    53,904.40x = 81,002.40 × 47,489.20
  4. Step 4: Simplify right side
    53,904.40x = 3,846,739,174.08
  5. Step 5: Solve for x
    x = 3,846,739,174.08/53,904.40
  6. Step 6: Final answer
    x = 71,362.25

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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.