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Finding the Fourth Proportional to 71,954.40, 99,320.40 and 48,086.40

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Solution

The fourth proportional to 71,954.40, 99,320.40 and 48,086.40 is: 66,374.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,954.40 : 99,320.40 = 48,086.40 : x
  2. Step 2: Convert to fraction form
    71,954.40/99,320.40 = 48,086.40/x
  3. Step 3: Cross multiply
    71,954.40x = 99,320.40 × 48,086.40
  4. Step 4: Simplify right side
    71,954.40x = 4,775,960,482.56
  5. Step 5: Solve for x
    x = 4,775,960,482.56/71,954.40
  6. Step 6: Final answer
    x = 66,374.82

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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.