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Finding the Fourth Proportional to 134,339, 185,388.90 and 74,723

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Solution

The fourth proportional to 134,339, 185,388.90 and 74,723 is: 103,118.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,339 : 185,388.90 = 74,723 : x
  2. Step 2: Convert to fraction form
    134,339/185,388.90 = 74,723/x
  3. Step 3: Cross multiply
    134,339x = 185,388.90 × 74,723
  4. Step 4: Simplify right side
    134,339x = 13,852,814,774.70
  5. Step 5: Solve for x
    x = 13,852,814,774.70/134,339
  6. Step 6: Final answer
    x = 103,118.34

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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.