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Finding the Fourth Proportional to 149,999.70, 206,999.73 and 86,349.90

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Solution

The fourth proportional to 149,999.70, 206,999.73 and 86,349.90 is: 119,162.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,999.70 : 206,999.73 = 86,349.90 : x
  2. Step 2: Convert to fraction form
    149,999.70/206,999.73 = 86,349.90/x
  3. Step 3: Cross multiply
    149,999.70x = 206,999.73 × 86,349.90
  4. Step 4: Simplify right side
    149,999.70x = 17,874,405,985.53
  5. Step 5: Solve for x
    x = 17,874,405,985.53/149,999.70
  6. Step 6: Final answer
    x = 119,162.94

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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.