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Finding the Fourth Proportional to 356,129.10, 534,221.30 and 103,413.76

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Solution

The fourth proportional to 356,129.10, 534,221.30 and 103,413.76 is: 155,128.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,129.10 : 534,221.30 = 103,413.76 : x
  2. Step 2: Convert to fraction form
    356,129.10/534,221.30 = 103,413.76/x
  3. Step 3: Cross multiply
    356,129.10x = 534,221.30 × 103,413.76
  4. Step 4: Simplify right side
    356,129.10x = 55,245,833,305.09
  5. Step 5: Solve for x
    x = 55,245,833,305.09/356,129.10
  6. Step 6: Final answer
    x = 155,128.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.