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Finding the Fourth Proportional to 134,359, 185,415.60 and 74,743

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Solution

The fourth proportional to 134,359, 185,415.60 and 74,743 is: 103,145.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,359 : 185,415.60 = 74,743 : x
  2. Step 2: Convert to fraction form
    134,359/185,415.60 = 74,743/x
  3. Step 3: Cross multiply
    134,359x = 185,415.60 × 74,743
  4. Step 4: Simplify right side
    134,359x = 13,858,518,190.80
  5. Step 5: Solve for x
    x = 13,858,518,190.80/134,359
  6. Step 6: Final answer
    x = 103,145.44

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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.