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Finding the Fourth Proportional to 100,924.77, 139,275.54 and 55,601.70

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Solution

The fourth proportional to 100,924.77, 139,275.54 and 55,601.70 is: 76,729.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,924.77 : 139,275.54 = 55,601.70 : x
  2. Step 2: Convert to fraction form
    100,924.77/139,275.54 = 55,601.70/x
  3. Step 3: Cross multiply
    100,924.77x = 139,275.54 × 55,601.70
  4. Step 4: Simplify right side
    100,924.77x = 7,743,956,792.42
  5. Step 5: Solve for x
    x = 7,743,956,792.42/100,924.77
  6. Step 6: Final answer
    x = 76,729.99

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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.