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Finding the Fourth Proportional to 139,303.53, 192,239.64 and 75,641.31

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Solution

The fourth proportional to 139,303.53, 192,239.64 and 75,641.31 is: 104,385.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,303.53 : 192,239.64 = 75,641.31 : x
  2. Step 2: Convert to fraction form
    139,303.53/192,239.64 = 75,641.31/x
  3. Step 3: Cross multiply
    139,303.53x = 192,239.64 × 75,641.31
  4. Step 4: Simplify right side
    139,303.53x = 14,541,258,203.53
  5. Step 5: Solve for x
    x = 14,541,258,203.53/139,303.53
  6. Step 6: Final answer
    x = 104,385.43

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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.