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Finding the Fourth Proportional to 85,697.52, 128,552.28 and 26,525.40

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Solution

The fourth proportional to 85,697.52, 128,552.28 and 26,525.40 is: 39,789.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,697.52 : 128,552.28 = 26,525.40 : x
  2. Step 2: Convert to fraction form
    85,697.52/128,552.28 = 26,525.40/x
  3. Step 3: Cross multiply
    85,697.52x = 128,552.28 × 26,525.40
  4. Step 4: Simplify right side
    85,697.52x = 3,409,900,647.91
  5. Step 5: Solve for x
    x = 3,409,900,647.91/85,697.52
  6. Step 6: Final answer
    x = 39,789.96

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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.