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Finding the Fourth Proportional to 100,840.54, 139,154.53 and 55,509.70

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Solution

The fourth proportional to 100,840.54, 139,154.53 and 55,509.70 is: 76,600.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,840.54 : 139,154.53 = 55,509.70 : x
  2. Step 2: Convert to fraction form
    100,840.54/139,154.53 = 55,509.70/x
  3. Step 3: Cross multiply
    100,840.54x = 139,154.53 × 55,509.70
  4. Step 4: Simplify right side
    100,840.54x = 7,724,426,213.94
  5. Step 5: Solve for x
    x = 7,724,426,213.94/100,840.54
  6. Step 6: Final answer
    x = 76,600.41

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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.