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Finding the Fourth Proportional to 103,609.66, 155,413.98 and 89,526.83

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Solution

The fourth proportional to 103,609.66, 155,413.98 and 89,526.83 is: 134,289.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,609.66 : 155,413.98 = 89,526.83 : x
  2. Step 2: Convert to fraction form
    103,609.66/155,413.98 = 89,526.83/x
  3. Step 3: Cross multiply
    103,609.66x = 155,413.98 × 89,526.83
  4. Step 4: Simplify right side
    103,609.66x = 13,913,721,156.87
  5. Step 5: Solve for x
    x = 13,913,721,156.87/103,609.66
  6. Step 6: Final answer
    x = 134,289.81

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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.