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Finding the Fourth Proportional to 123,399.60, 184,991.40 and 83,828.40

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Solution

The fourth proportional to 123,399.60, 184,991.40 and 83,828.40 is: 125,669.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,399.60 : 184,991.40 = 83,828.40 : x
  2. Step 2: Convert to fraction form
    123,399.60/184,991.40 = 83,828.40/x
  3. Step 3: Cross multiply
    123,399.60x = 184,991.40 × 83,828.40
  4. Step 4: Simplify right side
    123,399.60x = 15,507,533,075.76
  5. Step 5: Solve for x
    x = 15,507,533,075.76/123,399.60
  6. Step 6: Final answer
    x = 125,669.23

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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.