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Finding the Fourth Proportional to 139,185.66, 208,607.48 and 64,201.80

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Solution

The fourth proportional to 139,185.66, 208,607.48 and 64,201.80 is: 96,223.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,185.66 : 208,607.48 = 64,201.80 : x
  2. Step 2: Convert to fraction form
    139,185.66/208,607.48 = 64,201.80/x
  3. Step 3: Cross multiply
    139,185.66x = 208,607.48 × 64,201.80
  4. Step 4: Simplify right side
    139,185.66x = 13,392,975,709.46
  5. Step 5: Solve for x
    x = 13,392,975,709.46/139,185.66
  6. Step 6: Final answer
    x = 96,223.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.