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Finding the Fourth Proportional to 85,718.01, 128,548.53 and 29,556.72

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Solution

The fourth proportional to 85,718.01, 128,548.53 and 29,556.72 is: 44,325.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,718.01 : 128,548.53 = 29,556.72 : x
  2. Step 2: Convert to fraction form
    85,718.01/128,548.53 = 29,556.72/x
  3. Step 3: Cross multiply
    85,718.01x = 128,548.53 × 29,556.72
  4. Step 4: Simplify right side
    85,718.01x = 3,799,472,907.62
  5. Step 5: Solve for x
    x = 3,799,472,907.62/85,718.01
  6. Step 6: Final answer
    x = 44,325.26

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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.