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Finding the Fourth Proportional to 81,653.64, 112,679.13 and 45,845.16

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Solution

The fourth proportional to 81,653.64, 112,679.13 and 45,845.16 is: 63,264.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,653.64 : 112,679.13 = 45,845.16 : x
  2. Step 2: Convert to fraction form
    81,653.64/112,679.13 = 45,845.16/x
  3. Step 3: Cross multiply
    81,653.64x = 112,679.13 × 45,845.16
  4. Step 4: Simplify right side
    81,653.64x = 5,165,793,056.80
  5. Step 5: Solve for x
    x = 5,165,793,056.80/81,653.64
  6. Step 6: Final answer
    x = 63,264.70

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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.