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Finding the Fourth Proportional to 85,884.88, 128,833.52 and 28,958.98

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Solution

The fourth proportional to 85,884.88, 128,833.52 and 28,958.98 is: 43,440.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,884.88 : 128,833.52 = 28,958.98 : x
  2. Step 2: Convert to fraction form
    85,884.88/128,833.52 = 28,958.98/x
  3. Step 3: Cross multiply
    85,884.88x = 128,833.52 × 28,958.98
  4. Step 4: Simplify right side
    85,884.88x = 3,730,887,079.32
  5. Step 5: Solve for x
    x = 3,730,887,079.32/85,884.88
  6. Step 6: Final answer
    x = 43,440.56

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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.