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Finding the Fourth Proportional to 81,489.62, 112,455.53 and 45,679.62

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Solution

The fourth proportional to 81,489.62, 112,455.53 and 45,679.62 is: 63,037.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,489.62 : 112,455.53 = 45,679.62 : x
  2. Step 2: Convert to fraction form
    81,489.62/112,455.53 = 45,679.62/x
  3. Step 3: Cross multiply
    81,489.62x = 112,455.53 × 45,679.62
  4. Step 4: Simplify right side
    81,489.62x = 5,136,925,877.30
  5. Step 5: Solve for x
    x = 5,136,925,877.30/81,489.62
  6. Step 6: Final answer
    x = 63,037.79

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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.