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Finding the Fourth Proportional to 81,236.84, 112,117.26 and 45,428.84

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Solution

The fourth proportional to 81,236.84, 112,117.26 and 45,428.84 is: 62,697.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,236.84 : 112,117.26 = 45,428.84 : x
  2. Step 2: Convert to fraction form
    81,236.84/112,117.26 = 45,428.84/x
  3. Step 3: Cross multiply
    81,236.84x = 112,117.26 × 45,428.84
  4. Step 4: Simplify right side
    81,236.84x = 5,093,357,065.78
  5. Step 5: Solve for x
    x = 5,093,357,065.78/81,236.84
  6. Step 6: Final answer
    x = 62,697.63

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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.