Home / 90,720.15-125,174.48-54,903.03

Finding the Fourth Proportional to 90,720.15, 125,174.48 and 54,903.03

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Solution

The fourth proportional to 90,720.15, 125,174.48 and 54,903.03 is: 75,754.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,720.15 : 125,174.48 = 54,903.03 : x
  2. Step 2: Convert to fraction form
    90,720.15/125,174.48 = 54,903.03/x
  3. Step 3: Cross multiply
    90,720.15x = 125,174.48 × 54,903.03
  4. Step 4: Simplify right side
    90,720.15x = 6,872,457,956.16
  5. Step 5: Solve for x
    x = 6,872,457,956.16/90,720.15
  6. Step 6: Final answer
    x = 75,754.48

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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.