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Finding the Fourth Proportional to 55,812, 77,020.59 and 30,663.12

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Solution

The fourth proportional to 55,812, 77,020.59 and 30,663.12 is: 42,315.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,812 : 77,020.59 = 30,663.12 : x
  2. Step 2: Convert to fraction form
    55,812/77,020.59 = 30,663.12/x
  3. Step 3: Cross multiply
    55,812x = 77,020.59 × 30,663.12
  4. Step 4: Simplify right side
    55,812x = 2,361,691,593.64
  5. Step 5: Solve for x
    x = 2,361,691,593.64/55,812
  6. Step 6: Final answer
    x = 42,315.12

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.