Home / 65,764.32-90,739.08-38,904.72

Finding the Fourth Proportional to 65,764.32, 90,739.08 and 38,904.72

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Solution

The fourth proportional to 65,764.32, 90,739.08 and 38,904.72 is: 53,679.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,764.32 : 90,739.08 = 38,904.72 : x
  2. Step 2: Convert to fraction form
    65,764.32/90,739.08 = 38,904.72/x
  3. Step 3: Cross multiply
    65,764.32x = 90,739.08 × 38,904.72
  4. Step 4: Simplify right side
    65,764.32x = 3,530,178,500.46
  5. Step 5: Solve for x
    x = 3,530,178,500.46/65,764.32
  6. Step 6: Final answer
    x = 53,679.24

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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.