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Finding the Fourth Proportional to 55,665.70, 76,818.70 and 30,172.30

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Solution

The fourth proportional to 55,665.70, 76,818.70 and 30,172.30 is: 41,637.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,665.70 : 76,818.70 = 30,172.30 : x
  2. Step 2: Convert to fraction form
    55,665.70/76,818.70 = 30,172.30/x
  3. Step 3: Cross multiply
    55,665.70x = 76,818.70 × 30,172.30
  4. Step 4: Simplify right side
    55,665.70x = 2,317,796,862.01
  5. Step 5: Solve for x
    x = 2,317,796,862.01/55,665.70
  6. Step 6: Final answer
    x = 41,637.79

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1.5x scale

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.