Home / 135,904.30-203,856.45-85,712.65

Finding the Fourth Proportional to 135,904.30, 203,856.45 and 85,712.65

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Solution

The fourth proportional to 135,904.30, 203,856.45 and 85,712.65 is: 128,568.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,904.30 : 203,856.45 = 85,712.65 : x
  2. Step 2: Convert to fraction form
    135,904.30/203,856.45 = 85,712.65/x
  3. Step 3: Cross multiply
    135,904.30x = 203,856.45 × 85,712.65
  4. Step 4: Simplify right side
    135,904.30x = 17,473,076,549.09
  5. Step 5: Solve for x
    x = 17,473,076,549.09/135,904.30
  6. Step 6: Final answer
    x = 128,568.98

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1.5x scale

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.