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Finding the Fourth Proportional to 85,625.84, 128,405.48 and 29,455.28

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Solution

The fourth proportional to 85,625.84, 128,405.48 and 29,455.28 is: 44,171.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,625.84 : 128,405.48 = 29,455.28 : x
  2. Step 2: Convert to fraction form
    85,625.84/128,405.48 = 29,455.28/x
  3. Step 3: Cross multiply
    85,625.84x = 128,405.48 × 29,455.28
  4. Step 4: Simplify right side
    85,625.84x = 3,782,219,366.93
  5. Step 5: Solve for x
    x = 3,782,219,366.93/85,625.84
  6. Step 6: Final answer
    x = 44,171.47

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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.