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Finding the Fourth Proportional to 101,041.20, 139,437.54 and 55,720.80

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Solution

The fourth proportional to 101,041.20, 139,437.54 and 55,720.80 is: 76,895.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,041.20 : 139,437.54 = 55,720.80 : x
  2. Step 2: Convert to fraction form
    101,041.20/139,437.54 = 55,720.80/x
  3. Step 3: Cross multiply
    101,041.20x = 139,437.54 × 55,720.80
  4. Step 4: Simplify right side
    101,041.20x = 7,769,571,278.83
  5. Step 5: Solve for x
    x = 7,769,571,278.83/101,041.20
  6. Step 6: Final answer
    x = 76,895.08

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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.