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Finding the Fourth Proportional to 81,316.68, 112,213.38 and 45,019.50

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Solution

The fourth proportional to 81,316.68, 112,213.38 and 45,019.50 is: 62,124.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,316.68 : 112,213.38 = 45,019.50 : x
  2. Step 2: Convert to fraction form
    81,316.68/112,213.38 = 45,019.50/x
  3. Step 3: Cross multiply
    81,316.68x = 112,213.38 × 45,019.50
  4. Step 4: Simplify right side
    81,316.68x = 5,051,790,260.91
  5. Step 5: Solve for x
    x = 5,051,790,260.91/81,316.68
  6. Step 6: Final answer
    x = 62,124.90

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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.