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Finding the Fourth Proportional to 103,668.52, 143,106.70 and 69,696.72

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Solution

The fourth proportional to 103,668.52, 143,106.70 and 69,696.72 is: 96,211.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,668.52 : 143,106.70 = 69,696.72 : x
  2. Step 2: Convert to fraction form
    103,668.52/143,106.70 = 69,696.72/x
  3. Step 3: Cross multiply
    103,668.52x = 143,106.70 × 69,696.72
  4. Step 4: Simplify right side
    103,668.52x = 9,974,067,600.02
  5. Step 5: Solve for x
    x = 9,974,067,600.02/103,668.52
  6. Step 6: Final answer
    x = 96,211.15

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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.