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Finding the Fourth Proportional to 80,671.16, 121,012.52 and 21,506.52

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Solution

The fourth proportional to 80,671.16, 121,012.52 and 21,506.52 is: 32,261.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,671.16 : 121,012.52 = 21,506.52 : x
  2. Step 2: Convert to fraction form
    80,671.16/121,012.52 = 21,506.52/x
  3. Step 3: Cross multiply
    80,671.16x = 121,012.52 × 21,506.52
  4. Step 4: Simplify right side
    80,671.16x = 2,602,558,181.63
  5. Step 5: Solve for x
    x = 2,602,558,181.63/80,671.16
  6. Step 6: Final answer
    x = 32,261.32

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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.