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Finding the Fourth Proportional to 145,481.92, 218,223.08 and 45,649.76

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Solution

The fourth proportional to 145,481.92, 218,223.08 and 45,649.76 is: 68,474.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,481.92 : 218,223.08 = 45,649.76 : x
  2. Step 2: Convert to fraction form
    145,481.92/218,223.08 = 45,649.76/x
  3. Step 3: Cross multiply
    145,481.92x = 218,223.08 × 45,649.76
  4. Step 4: Simplify right side
    145,481.92x = 9,961,831,228.46
  5. Step 5: Solve for x
    x = 9,961,831,228.46/145,481.92
  6. Step 6: Final answer
    x = 68,474.70

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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.