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Finding the Fourth Proportional to 145,229.70, 217,858 and 56,489.88

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Solution

The fourth proportional to 145,229.70, 217,858 and 56,489.88 is: 84,740.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,229.70 : 217,858 = 56,489.88 : x
  2. Step 2: Convert to fraction form
    145,229.70/217,858 = 56,489.88/x
  3. Step 3: Cross multiply
    145,229.70x = 217,858 × 56,489.88
  4. Step 4: Simplify right side
    145,229.70x = 12,306,772,277.04
  5. Step 5: Solve for x
    x = 12,306,772,277.04/145,229.70
  6. Step 6: Final answer
    x = 84,740.05

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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.