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Finding the Fourth Proportional to 139,706.32, 192,798.93 and 86,022.31

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Solution

The fourth proportional to 139,706.32, 192,798.93 and 86,022.31 is: 118,713.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,706.32 : 192,798.93 = 86,022.31 : x
  2. Step 2: Convert to fraction form
    139,706.32/192,798.93 = 86,022.31/x
  3. Step 3: Cross multiply
    139,706.32x = 192,798.93 × 86,022.31
  4. Step 4: Simplify right side
    139,706.32x = 16,585,009,324.13
  5. Step 5: Solve for x
    x = 16,585,009,324.13/139,706.32
  6. Step 6: Final answer
    x = 118,713.38

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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.