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Finding the Fourth Proportional to 83,671.84, 115,467.12 and 45,431.20

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Solution

The fourth proportional to 83,671.84, 115,467.12 and 45,431.20 is: 62,695.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,671.84 : 115,467.12 = 45,431.20 : x
  2. Step 2: Convert to fraction form
    83,671.84/115,467.12 = 45,431.20/x
  3. Step 3: Cross multiply
    83,671.84x = 115,467.12 × 45,431.20
  4. Step 4: Simplify right side
    83,671.84x = 5,245,809,316.98
  5. Step 5: Solve for x
    x = 5,245,809,316.98/83,671.84
  6. Step 6: Final answer
    x = 62,695.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.