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Finding the Fourth Proportional to 115,090.80, 172,636.56 and 31,984.80

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Solution

The fourth proportional to 115,090.80, 172,636.56 and 31,984.80 is: 47,977.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,090.80 : 172,636.56 = 31,984.80 : x
  2. Step 2: Convert to fraction form
    115,090.80/172,636.56 = 31,984.80/x
  3. Step 3: Cross multiply
    115,090.80x = 172,636.56 × 31,984.80
  4. Step 4: Simplify right side
    115,090.80x = 5,521,745,844.29
  5. Step 5: Solve for x
    x = 5,521,745,844.29/115,090.80
  6. Step 6: Final answer
    x = 47,977.30

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1.5x scale

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.