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Finding the Fourth Proportional to 139,930.40, 209,945.72 and 59,934.80

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Solution

The fourth proportional to 139,930.40, 209,945.72 and 59,934.80 is: 89,923.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,930.40 : 209,945.72 = 59,934.80 : x
  2. Step 2: Convert to fraction form
    139,930.40/209,945.72 = 59,934.80/x
  3. Step 3: Cross multiply
    139,930.40x = 209,945.72 × 59,934.80
  4. Step 4: Simplify right side
    139,930.40x = 12,583,055,413.76
  5. Step 5: Solve for x
    x = 12,583,055,413.76/139,930.40
  6. Step 6: Final answer
    x = 89,923.67

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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.