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Finding the Fourth Proportional to 172,060.96, 257,991 and 66,756.91

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Solution

The fourth proportional to 172,060.96, 257,991 and 66,756.91 is: 100,096.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,060.96 : 257,991 = 66,756.91 : x
  2. Step 2: Convert to fraction form
    172,060.96/257,991 = 66,756.91/x
  3. Step 3: Cross multiply
    172,060.96x = 257,991 × 66,756.91
  4. Step 4: Simplify right side
    172,060.96x = 17,222,681,967.81
  5. Step 5: Solve for x
    x = 17,222,681,967.81/172,060.96
  6. Step 6: Final answer
    x = 100,096.40

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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.