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Finding the Fourth Proportional to 158,301.88, 218,456.93 and 85,705.53

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Solution

The fourth proportional to 158,301.88, 218,456.93 and 85,705.53 is: 118,273.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,301.88 : 218,456.93 = 85,705.53 : x
  2. Step 2: Convert to fraction form
    158,301.88/218,456.93 = 85,705.53/x
  3. Step 3: Cross multiply
    158,301.88x = 218,456.93 × 85,705.53
  4. Step 4: Simplify right side
    158,301.88x = 18,722,966,362.87
  5. Step 5: Solve for x
    x = 18,722,966,362.87/158,301.88
  6. Step 6: Final answer
    x = 118,273.81

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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.