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Finding the Fourth Proportional to 85,515.87, 128,292.74 and 29,354.72

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Solution

The fourth proportional to 85,515.87, 128,292.74 and 29,354.72 is: 44,038.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,515.87 : 128,292.74 = 29,354.72 : x
  2. Step 2: Convert to fraction form
    85,515.87/128,292.74 = 29,354.72/x
  3. Step 3: Cross multiply
    85,515.87x = 128,292.74 × 29,354.72
  4. Step 4: Simplify right side
    85,515.87x = 3,765,997,460.73
  5. Step 5: Solve for x
    x = 3,765,997,460.73/85,515.87
  6. Step 6: Final answer
    x = 44,038.58

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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.