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Finding the Fourth Proportional to 139,146.63, 208,750.19 and 45,648.87

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Solution

The fourth proportional to 139,146.63, 208,750.19 and 45,648.87 is: 68,483.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,146.63 : 208,750.19 = 45,648.87 : x
  2. Step 2: Convert to fraction form
    139,146.63/208,750.19 = 45,648.87/x
  3. Step 3: Cross multiply
    139,146.63x = 208,750.19 × 45,648.87
  4. Step 4: Simplify right side
    139,146.63x = 9,529,210,057.54
  5. Step 5: Solve for x
    x = 9,529,210,057.54/139,146.63
  6. Step 6: Final answer
    x = 68,483.23

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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.