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Finding the Fourth Proportional to 147,413.50, 203,430.45 and 80,345.50

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Solution

The fourth proportional to 147,413.50, 203,430.45 and 80,345.50 is: 110,876.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,413.50 : 203,430.45 = 80,345.50 : x
  2. Step 2: Convert to fraction form
    147,413.50/203,430.45 = 80,345.50/x
  3. Step 3: Cross multiply
    147,413.50x = 203,430.45 × 80,345.50
  4. Step 4: Simplify right side
    147,413.50x = 16,344,721,220.48
  5. Step 5: Solve for x
    x = 16,344,721,220.48/147,413.50
  6. Step 6: Final answer
    x = 110,876.69

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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.