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Finding the Fourth Proportional to 139,583.20, 209,374.80 and 55,363.45

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Solution

The fourth proportional to 139,583.20, 209,374.80 and 55,363.45 is: 83,045.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,583.20 : 209,374.80 = 55,363.45 : x
  2. Step 2: Convert to fraction form
    139,583.20/209,374.80 = 55,363.45/x
  3. Step 3: Cross multiply
    139,583.20x = 209,374.80 × 55,363.45
  4. Step 4: Simplify right side
    139,583.20x = 11,591,711,271.06
  5. Step 5: Solve for x
    x = 11,591,711,271.06/139,583.20
  6. Step 6: Final answer
    x = 83,045.18

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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.