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Finding the Fourth Proportional to 147,147.90, 203,062.20 and 86,721.12

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Solution

The fourth proportional to 147,147.90, 203,062.20 and 86,721.12 is: 119,674.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,147.90 : 203,062.20 = 86,721.12 : x
  2. Step 2: Convert to fraction form
    147,147.90/203,062.20 = 86,721.12/x
  3. Step 3: Cross multiply
    147,147.90x = 203,062.20 × 86,721.12
  4. Step 4: Simplify right side
    147,147.90x = 17,609,781,413.66
  5. Step 5: Solve for x
    x = 17,609,781,413.66/147,147.90
  6. Step 6: Final answer
    x = 119,674.02

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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.