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Finding the Fourth Proportional to 170,012.80, 254,630.40 and 86,809.60

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Solution

The fourth proportional to 170,012.80, 254,630.40 and 86,809.60 is: 130,015.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,012.80 : 254,630.40 = 86,809.60 : x
  2. Step 2: Convert to fraction form
    170,012.80/254,630.40 = 86,809.60/x
  3. Step 3: Cross multiply
    170,012.80x = 254,630.40 × 86,809.60
  4. Step 4: Simplify right side
    170,012.80x = 22,104,363,171.84
  5. Step 5: Solve for x
    x = 22,104,363,171.84/170,012.80
  6. Step 6: Final answer
    x = 130,015.88

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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.