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Finding the Fourth Proportional to 81,038.88, 121,619.88 and 52,951.32

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Solution

The fourth proportional to 81,038.88, 121,619.88 and 52,951.32 is: 79,467.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,038.88 : 121,619.88 = 52,951.32 : x
  2. Step 2: Convert to fraction form
    81,038.88/121,619.88 = 52,951.32/x
  3. Step 3: Cross multiply
    81,038.88x = 121,619.88 × 52,951.32
  4. Step 4: Simplify right side
    81,038.88x = 6,439,933,184.24
  5. Step 5: Solve for x
    x = 6,439,933,184.24/81,038.88
  6. Step 6: Final answer
    x = 79,467.20

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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.