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Finding the Fourth Proportional to 139,424.49, 192,403.35 and 75,762.54

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Solution

The fourth proportional to 139,424.49, 192,403.35 and 75,762.54 is: 104,550.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,424.49 : 192,403.35 = 75,762.54 : x
  2. Step 2: Convert to fraction form
    139,424.49/192,403.35 = 75,762.54/x
  3. Step 3: Cross multiply
    139,424.49x = 192,403.35 × 75,762.54
  4. Step 4: Simplify right side
    139,424.49x = 14,576,966,500.51
  5. Step 5: Solve for x
    x = 14,576,966,500.51/139,424.49
  6. Step 6: Final answer
    x = 104,550.98

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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.