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Finding the Fourth Proportional to 134,340, 185,390.28 and 74,724

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Solution

The fourth proportional to 134,340, 185,390.28 and 74,724 is: 103,119.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,340 : 185,390.28 = 74,724 : x
  2. Step 2: Convert to fraction form
    134,340/185,390.28 = 74,724/x
  3. Step 3: Cross multiply
    134,340x = 185,390.28 × 74,724
  4. Step 4: Simplify right side
    134,340x = 13,853,103,282.72
  5. Step 5: Solve for x
    x = 13,853,103,282.72/134,340
  6. Step 6: Final answer
    x = 103,119.72

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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.