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Finding the Fourth Proportional to 172,199.79, 257,376.42 and 155,294.28

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Solution

The fourth proportional to 172,199.79, 257,376.42 and 155,294.28 is: 232,108.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,199.79 : 257,376.42 = 155,294.28 : x
  2. Step 2: Convert to fraction form
    172,199.79/257,376.42 = 155,294.28/x
  3. Step 3: Cross multiply
    172,199.79x = 257,376.42 × 155,294.28
  4. Step 4: Simplify right side
    172,199.79x = 39,969,085,832.88
  5. Step 5: Solve for x
    x = 39,969,085,832.88/172,199.79
  6. Step 6: Final answer
    x = 232,108.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.