Home / 139,940.64-193,118.07-76,278.87

Finding the Fourth Proportional to 139,940.64, 193,118.07 and 76,278.87

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Solution

The fourth proportional to 139,940.64, 193,118.07 and 76,278.87 is: 105,264.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,940.64 : 193,118.07 = 76,278.87 : x
  2. Step 2: Convert to fraction form
    139,940.64/193,118.07 = 76,278.87/x
  3. Step 3: Cross multiply
    139,940.64x = 193,118.07 × 76,278.87
  4. Step 4: Simplify right side
    139,940.64x = 14,730,828,156.18
  5. Step 5: Solve for x
    x = 14,730,828,156.18/139,940.64
  6. Step 6: Final answer
    x = 105,264.83

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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.