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Finding the Fourth Proportional to 101,209.77, 139,668.57 and 55,886.78

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Solution

The fourth proportional to 101,209.77, 139,668.57 and 55,886.78 is: 77,123.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,209.77 : 139,668.57 = 55,886.78 : x
  2. Step 2: Convert to fraction form
    101,209.77/139,668.57 = 55,886.78/x
  3. Step 3: Cross multiply
    101,209.77x = 139,668.57 × 55,886.78
  4. Step 4: Simplify right side
    101,209.77x = 7,805,626,155.74
  5. Step 5: Solve for x
    x = 7,805,626,155.74/101,209.77
  6. Step 6: Final answer
    x = 77,123.25

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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.