Home / 139,342.08-192,288.84-75,678.48

Finding the Fourth Proportional to 139,342.08, 192,288.84 and 75,678.48

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Solution

The fourth proportional to 139,342.08, 192,288.84 and 75,678.48 is: 104,434.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,342.08 : 192,288.84 = 75,678.48 : x
  2. Step 2: Convert to fraction form
    139,342.08/192,288.84 = 75,678.48/x
  3. Step 3: Cross multiply
    139,342.08x = 192,288.84 × 75,678.48
  4. Step 4: Simplify right side
    139,342.08x = 14,552,127,132.16
  5. Step 5: Solve for x
    x = 14,552,127,132.16/139,342.08
  6. Step 6: Final answer
    x = 104,434.55

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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.