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Finding the Fourth Proportional to 100,816.92, 139,125.60 and 55,495.80

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Solution

The fourth proportional to 100,816.92, 139,125.60 and 55,495.80 is: 76,583.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,816.92 : 139,125.60 = 55,495.80 : x
  2. Step 2: Convert to fraction form
    100,816.92/139,125.60 = 55,495.80/x
  3. Step 3: Cross multiply
    100,816.92x = 139,125.60 × 55,495.80
  4. Step 4: Simplify right side
    100,816.92x = 7,720,886,472.48
  5. Step 5: Solve for x
    x = 7,720,886,472.48/100,816.92
  6. Step 6: Final answer
    x = 76,583.24

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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.