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Finding the Fourth Proportional to 145,617.66, 218,435.87 and 45,781.72

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Solution

The fourth proportional to 145,617.66, 218,435.87 and 45,781.72 is: 68,675.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,617.66 : 218,435.87 = 45,781.72 : x
  2. Step 2: Convert to fraction form
    145,617.66/218,435.87 = 45,781.72/x
  3. Step 3: Cross multiply
    145,617.66x = 218,435.87 × 45,781.72
  4. Step 4: Simplify right side
    145,617.66x = 10,000,369,406.66
  5. Step 5: Solve for x
    x = 10,000,369,406.66/145,617.66
  6. Step 6: Final answer
    x = 68,675.53

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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.