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Finding the Fourth Proportional to 145,407.81, 218,111.37 and 45,575.61

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Solution

The fourth proportional to 145,407.81, 218,111.37 and 45,575.61 is: 68,363.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,407.81 : 218,111.37 = 45,575.61 : x
  2. Step 2: Convert to fraction form
    145,407.81/218,111.37 = 45,575.61/x
  3. Step 3: Cross multiply
    145,407.81x = 218,111.37 × 45,575.61
  4. Step 4: Simplify right side
    145,407.81x = 9,940,558,735.69
  5. Step 5: Solve for x
    x = 9,940,558,735.69/145,407.81
  6. Step 6: Final answer
    x = 68,363.31

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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.