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Finding the Fourth Proportional to 85,775.74, 128,673.11 and 29,609.48

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Solution

The fourth proportional to 85,775.74, 128,673.11 and 29,609.48 is: 44,417.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,775.74 : 128,673.11 = 29,609.48 : x
  2. Step 2: Convert to fraction form
    85,775.74/128,673.11 = 29,609.48/x
  3. Step 3: Cross multiply
    85,775.74x = 128,673.11 × 29,609.48
  4. Step 4: Simplify right side
    85,775.74x = 3,809,944,272.79
  5. Step 5: Solve for x
    x = 3,809,944,272.79/85,775.74
  6. Step 6: Final answer
    x = 44,417.51

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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.