Home / 85,431.12-128,008.24-52,049.92

Finding the Fourth Proportional to 85,431.12, 128,008.24 and 52,049.92

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Solution

The fourth proportional to 85,431.12, 128,008.24 and 52,049.92 is: 77,990.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,431.12 : 128,008.24 = 52,049.92 : x
  2. Step 2: Convert to fraction form
    85,431.12/128,008.24 = 52,049.92/x
  3. Step 3: Cross multiply
    85,431.12x = 128,008.24 × 52,049.92
  4. Step 4: Simplify right side
    85,431.12x = 6,662,818,651.34
  5. Step 5: Solve for x
    x = 6,662,818,651.34/85,431.12
  6. Step 6: Final answer
    x = 77,990.53

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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.