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Finding the Fourth Proportional to 145,355.64, 218,030.76 and 45,516.12

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Solution

The fourth proportional to 145,355.64, 218,030.76 and 45,516.12 is: 68,273.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,355.64 : 218,030.76 = 45,516.12 : x
  2. Step 2: Convert to fraction form
    145,355.64/218,030.76 = 45,516.12/x
  3. Step 3: Cross multiply
    145,355.64x = 218,030.76 × 45,516.12
  4. Step 4: Simplify right side
    145,355.64x = 9,923,914,235.85
  5. Step 5: Solve for x
    x = 9,923,914,235.85/145,355.64
  6. Step 6: Final answer
    x = 68,273.33

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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.