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Finding the Fourth Proportional to 85,820.79, 128,699.59 and 29,646.48

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Solution

The fourth proportional to 85,820.79, 128,699.59 and 29,646.48 is: 44,458.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,820.79 : 128,699.59 = 29,646.48 : x
  2. Step 2: Convert to fraction form
    85,820.79/128,699.59 = 29,646.48/x
  3. Step 3: Cross multiply
    85,820.79x = 128,699.59 × 29,646.48
  4. Step 4: Simplify right side
    85,820.79x = 3,815,489,820.94
  5. Step 5: Solve for x
    x = 3,815,489,820.94/85,820.79
  6. Step 6: Final answer
    x = 44,458.81

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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.