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Finding the Fourth Proportional to 136,399.60, 204,468.16 and 69,871.06

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Solution

The fourth proportional to 136,399.60, 204,468.16 and 69,871.06 is: 104,739.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,399.60 : 204,468.16 = 69,871.06 : x
  2. Step 2: Convert to fraction form
    136,399.60/204,468.16 = 69,871.06/x
  3. Step 3: Cross multiply
    136,399.60x = 204,468.16 × 69,871.06
  4. Step 4: Simplify right side
    136,399.60x = 14,286,407,075.45
  5. Step 5: Solve for x
    x = 14,286,407,075.45/136,399.60
  6. Step 6: Final answer
    x = 104,739.36

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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.