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Finding the Fourth Proportional to 101,361.99, 139,875.16 and 55,420.79

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Solution

The fourth proportional to 101,361.99, 139,875.16 and 55,420.79 is: 76,478.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,361.99 : 139,875.16 = 55,420.79 : x
  2. Step 2: Convert to fraction form
    101,361.99/139,875.16 = 55,420.79/x
  3. Step 3: Cross multiply
    101,361.99x = 139,875.16 × 55,420.79
  4. Step 4: Simplify right side
    101,361.99x = 7,751,991,591.47
  5. Step 5: Solve for x
    x = 7,751,991,591.47/101,361.99
  6. Step 6: Final answer
    x = 76,478.29

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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.