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Finding the Fourth Proportional to 170,642, 235,456.80 and 99,005.60

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Solution

The fourth proportional to 170,642, 235,456.80 and 99,005.60 is: 136,610.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,642 : 235,456.80 = 99,005.60 : x
  2. Step 2: Convert to fraction form
    170,642/235,456.80 = 99,005.60/x
  3. Step 3: Cross multiply
    170,642x = 235,456.80 × 99,005.60
  4. Step 4: Simplify right side
    170,642x = 23,311,541,758.08
  5. Step 5: Solve for x
    x = 23,311,541,758.08/170,642
  6. Step 6: Final answer
    x = 136,610.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.