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Finding the Fourth Proportional to 85,774.72, 128,698.80 and 35,866.48

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Solution

The fourth proportional to 85,774.72, 128,698.80 and 35,866.48 is: 53,815.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,774.72 : 128,698.80 = 35,866.48 : x
  2. Step 2: Convert to fraction form
    85,774.72/128,698.80 = 35,866.48/x
  3. Step 3: Cross multiply
    85,774.72x = 128,698.80 × 35,866.48
  4. Step 4: Simplify right side
    85,774.72x = 4,615,972,936.22
  5. Step 5: Solve for x
    x = 4,615,972,936.22/85,774.72
  6. Step 6: Final answer
    x = 53,815.07

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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.