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Finding the Fourth Proportional to 101,279.36, 139,764.69 and 55,957.19

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Solution

The fourth proportional to 101,279.36, 139,764.69 and 55,957.19 is: 77,220.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,279.36 : 139,764.69 = 55,957.19 : x
  2. Step 2: Convert to fraction form
    101,279.36/139,764.69 = 55,957.19/x
  3. Step 3: Cross multiply
    101,279.36x = 139,764.69 × 55,957.19
  4. Step 4: Simplify right side
    101,279.36x = 7,820,839,663.03
  5. Step 5: Solve for x
    x = 7,820,839,663.03/101,279.36
  6. Step 6: Final answer
    x = 77,220.47

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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.