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Finding the Fourth Proportional to 85,757.86, 128,649.24 and 26,598.29

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Solution

The fourth proportional to 85,757.86, 128,649.24 and 26,598.29 is: 39,901.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,757.86 : 128,649.24 = 26,598.29 : x
  2. Step 2: Convert to fraction form
    85,757.86/128,649.24 = 26,598.29/x
  3. Step 3: Cross multiply
    85,757.86x = 128,649.24 × 26,598.29
  4. Step 4: Simplify right side
    85,757.86x = 3,421,850,115.42
  5. Step 5: Solve for x
    x = 3,421,850,115.42/85,757.86
  6. Step 6: Final answer
    x = 39,901.30

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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.