Home / 102,709.31-141,724.75-57,381.66

Finding the Fourth Proportional to 102,709.31, 141,724.75 and 57,381.66

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Solution

The fourth proportional to 102,709.31, 141,724.75 and 57,381.66 is: 79,178.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,709.31 : 141,724.75 = 57,381.66 : x
  2. Step 2: Convert to fraction form
    102,709.31/141,724.75 = 57,381.66/x
  3. Step 3: Cross multiply
    102,709.31x = 141,724.75 × 57,381.66
  4. Step 4: Simplify right side
    102,709.31x = 8,132,401,274.63
  5. Step 5: Solve for x
    x = 8,132,401,274.63/102,709.31
  6. Step 6: Final answer
    x = 79,178.82

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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.