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Finding the Fourth Proportional to 170,012.30, 254,629.65 and 86,809.10

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Solution

The fourth proportional to 170,012.30, 254,629.65 and 86,809.10 is: 130,015.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,012.30 : 254,629.65 = 86,809.10 : x
  2. Step 2: Convert to fraction form
    170,012.30/254,629.65 = 86,809.10/x
  3. Step 3: Cross multiply
    170,012.30x = 254,629.65 × 86,809.10
  4. Step 4: Simplify right side
    170,012.30x = 22,104,170,749.82
  5. Step 5: Solve for x
    x = 22,104,170,749.82/170,012.30
  6. Step 6: Final answer
    x = 130,015.13

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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.