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Finding the Fourth Proportional to 131,191.64, 181,043.54 and 74,603

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Solution

The fourth proportional to 131,191.64, 181,043.54 and 74,603 is: 102,951.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,191.64 : 181,043.54 = 74,603 : x
  2. Step 2: Convert to fraction form
    131,191.64/181,043.54 = 74,603/x
  3. Step 3: Cross multiply
    131,191.64x = 181,043.54 × 74,603
  4. Step 4: Simplify right side
    131,191.64x = 13,506,391,214.62
  5. Step 5: Solve for x
    x = 13,506,391,214.62/131,191.64
  6. Step 6: Final answer
    x = 102,951.62

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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.