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Finding the Fourth Proportional to 145,403.70, 218,105.54 and 40,219.93

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Solution

The fourth proportional to 145,403.70, 218,105.54 and 40,219.93 is: 60,329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,403.70 : 218,105.54 = 40,219.93 : x
  2. Step 2: Convert to fraction form
    145,403.70/218,105.54 = 40,219.93/x
  3. Step 3: Cross multiply
    145,403.70x = 218,105.54 × 40,219.93
  4. Step 4: Simplify right side
    145,403.70x = 8,772,189,551.41
  5. Step 5: Solve for x
    x = 8,772,189,551.41/145,403.70
  6. Step 6: Final answer
    x = 60,329.89

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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.