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Finding the Fourth Proportional to 73,780.65, 109,970.55 and 71,350.65

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Solution

The fourth proportional to 73,780.65, 109,970.55 and 71,350.65 is: 106,348.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,780.65 : 109,970.55 = 71,350.65 : x
  2. Step 2: Convert to fraction form
    73,780.65/109,970.55 = 71,350.65/x
  3. Step 3: Cross multiply
    73,780.65x = 109,970.55 × 71,350.65
  4. Step 4: Simplify right side
    73,780.65x = 7,846,470,223.36
  5. Step 5: Solve for x
    x = 7,846,470,223.36/73,780.65
  6. Step 6: Final answer
    x = 106,348.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.