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Finding the Fourth Proportional to 139,545.70, 209,318.55 and 132,328.60

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Solution

The fourth proportional to 139,545.70, 209,318.55 and 132,328.60 is: 198,492.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,545.70 : 209,318.55 = 132,328.60 : x
  2. Step 2: Convert to fraction form
    139,545.70/209,318.55 = 132,328.60/x
  3. Step 3: Cross multiply
    139,545.70x = 209,318.55 × 132,328.60
  4. Step 4: Simplify right side
    139,545.70x = 27,698,830,675.53
  5. Step 5: Solve for x
    x = 27,698,830,675.53/139,545.70
  6. Step 6: Final answer
    x = 198,492.90

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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.