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Finding the Fourth Proportional to 99,900.79, 149,924.93 and 47,310.19

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Solution

The fourth proportional to 99,900.79, 149,924.93 and 47,310.19 is: 71,000.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,900.79 : 149,924.93 = 47,310.19 : x
  2. Step 2: Convert to fraction form
    99,900.79/149,924.93 = 47,310.19/x
  3. Step 3: Cross multiply
    99,900.79x = 149,924.93 × 47,310.19
  4. Step 4: Simplify right side
    99,900.79x = 7,092,976,687.49
  5. Step 5: Solve for x
    x = 7,092,976,687.49/99,900.79
  6. Step 6: Final answer
    x = 71,000.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.