Home / 139,442.64-192,422.94-75,780

Finding the Fourth Proportional to 139,442.64, 192,422.94 and 75,780

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Solution

The fourth proportional to 139,442.64, 192,422.94 and 75,780 is: 104,572.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,442.64 : 192,422.94 = 75,780 : x
  2. Step 2: Convert to fraction form
    139,442.64/192,422.94 = 75,780/x
  3. Step 3: Cross multiply
    139,442.64x = 192,422.94 × 75,780
  4. Step 4: Simplify right side
    139,442.64x = 14,581,810,393.20
  5. Step 5: Solve for x
    x = 14,581,810,393.20/139,442.64
  6. Step 6: Final answer
    x = 104,572.11

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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.