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Finding the Fourth Proportional to 81,630.40, 112,661.32 and 45,340

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Solution

The fourth proportional to 81,630.40, 112,661.32 and 45,340 is: 62,575.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,630.40 : 112,661.32 = 45,340 : x
  2. Step 2: Convert to fraction form
    81,630.40/112,661.32 = 45,340/x
  3. Step 3: Cross multiply
    81,630.40x = 112,661.32 × 45,340
  4. Step 4: Simplify right side
    81,630.40x = 5,108,064,248.80
  5. Step 5: Solve for x
    x = 5,108,064,248.80/81,630.40
  6. Step 6: Final answer
    x = 62,575.51

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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.