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Finding the Fourth Proportional to 172,376.40, 257,981.40 and 151,381.20

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Solution

The fourth proportional to 172,376.40, 257,981.40 and 151,381.20 is: 226,559.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,376.40 : 257,981.40 = 151,381.20 : x
  2. Step 2: Convert to fraction form
    172,376.40/257,981.40 = 151,381.20/x
  3. Step 3: Cross multiply
    172,376.40x = 257,981.40 × 151,381.20
  4. Step 4: Simplify right side
    172,376.40x = 39,053,533,909.68
  5. Step 5: Solve for x
    x = 39,053,533,909.68/172,376.40
  6. Step 6: Final answer
    x = 226,559.63

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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.