Home / 124,090.72-171,153.54-78,729.64

Finding the Fourth Proportional to 124,090.72, 171,153.54 and 78,729.64

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Solution

The fourth proportional to 124,090.72, 171,153.54 and 78,729.64 is: 108,588.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,090.72 : 171,153.54 = 78,729.64 : x
  2. Step 2: Convert to fraction form
    124,090.72/171,153.54 = 78,729.64/x
  3. Step 3: Cross multiply
    124,090.72x = 171,153.54 × 78,729.64
  4. Step 4: Simplify right side
    124,090.72x = 13,474,856,588.93
  5. Step 5: Solve for x
    x = 13,474,856,588.93/124,090.72
  6. Step 6: Final answer
    x = 108,588.75

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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.