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Finding the Fourth Proportional to 139,683.64, 209,553.14 and 55,483.46

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Solution

The fourth proportional to 139,683.64, 209,553.14 and 55,483.46 is: 83,236.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,683.64 : 209,553.14 = 55,483.46 : x
  2. Step 2: Convert to fraction form
    139,683.64/209,553.14 = 55,483.46/x
  3. Step 3: Cross multiply
    139,683.64x = 209,553.14 × 55,483.46
  4. Step 4: Simplify right side
    139,683.64x = 11,626,733,261.06
  5. Step 5: Solve for x
    x = 11,626,733,261.06/139,683.64
  6. Step 6: Final answer
    x = 83,236.18

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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.