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Finding the Fourth Proportional to 145,157.63, 217,761.96 and 66,279.83

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Solution

The fourth proportional to 145,157.63, 217,761.96 and 66,279.83 is: 99,431.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,157.63 : 217,761.96 = 66,279.83 : x
  2. Step 2: Convert to fraction form
    145,157.63/217,761.96 = 66,279.83/x
  3. Step 3: Cross multiply
    145,157.63x = 217,761.96 × 66,279.83
  4. Step 4: Simplify right side
    145,157.63x = 14,433,225,689.27
  5. Step 5: Solve for x
    x = 14,433,225,689.27/145,157.63
  6. Step 6: Final answer
    x = 99,431.40

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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.