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Finding the Fourth Proportional to 99,145.80, 148,815.90 and 49,282.20

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Solution

The fourth proportional to 99,145.80, 148,815.90 and 49,282.20 is: 73,971.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,145.80 : 148,815.90 = 49,282.20 : x
  2. Step 2: Convert to fraction form
    99,145.80/148,815.90 = 49,282.20/x
  3. Step 3: Cross multiply
    99,145.80x = 148,815.90 × 49,282.20
  4. Step 4: Simplify right side
    99,145.80x = 7,333,974,946.98
  5. Step 5: Solve for x
    x = 7,333,974,946.98/99,145.80
  6. Step 6: Final answer
    x = 73,971.62

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1.5x scale

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.