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Finding the Fourth Proportional to 55,109.70, 82,664.55 and 45,389.70

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Solution

The fourth proportional to 55,109.70, 82,664.55 and 45,389.70 is: 68,084.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,109.70 : 82,664.55 = 45,389.70 : x
  2. Step 2: Convert to fraction form
    55,109.70/82,664.55 = 45,389.70/x
  3. Step 3: Cross multiply
    55,109.70x = 82,664.55 × 45,389.70
  4. Step 4: Simplify right side
    55,109.70x = 3,752,119,125.14
  5. Step 5: Solve for x
    x = 3,752,119,125.14/55,109.70
  6. Step 6: Final answer
    x = 68,084.55

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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.