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Finding the Fourth Proportional to 81,293.98, 112,136.57 and 53,698.81

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Solution

The fourth proportional to 81,293.98, 112,136.57 and 53,698.81 is: 74,071.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,293.98 : 112,136.57 = 53,698.81 : x
  2. Step 2: Convert to fraction form
    81,293.98/112,136.57 = 53,698.81/x
  3. Step 3: Cross multiply
    81,293.98x = 112,136.57 × 53,698.81
  4. Step 4: Simplify right side
    81,293.98x = 6,021,599,805.80
  5. Step 5: Solve for x
    x = 6,021,599,805.80/81,293.98
  6. Step 6: Final answer
    x = 74,071.91

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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.