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Finding the Fourth Proportional to 120,987.50, 166,943.31 and 69,999.62

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Solution

The fourth proportional to 120,987.50, 166,943.31 and 69,999.62 is: 96,588.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,987.50 : 166,943.31 = 69,999.62 : x
  2. Step 2: Convert to fraction form
    120,987.50/166,943.31 = 69,999.62/x
  3. Step 3: Cross multiply
    120,987.50x = 166,943.31 × 69,999.62
  4. Step 4: Simplify right side
    120,987.50x = 11,685,968,261.54
  5. Step 5: Solve for x
    x = 11,685,968,261.54/120,987.50
  6. Step 6: Final answer
    x = 96,588.23

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1.5x scale

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.