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Finding the Fourth Proportional to 81,036.64, 121,567.92 and 34,289.92

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Solution

The fourth proportional to 81,036.64, 121,567.92 and 34,289.92 is: 51,440.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,036.64 : 121,567.92 = 34,289.92 : x
  2. Step 2: Convert to fraction form
    81,036.64/121,567.92 = 34,289.92/x
  3. Step 3: Cross multiply
    81,036.64x = 121,567.92 × 34,289.92
  4. Step 4: Simplify right side
    81,036.64x = 4,168,554,251.37
  5. Step 5: Solve for x
    x = 4,168,554,251.37/81,036.64
  6. Step 6: Final answer
    x = 51,440.36

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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.