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Finding the Fourth Proportional to 172,062.61, 257,678.62 and 103,476.93

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Solution

The fourth proportional to 172,062.61, 257,678.62 and 103,476.93 is: 154,965.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,062.61 : 257,678.62 = 103,476.93 : x
  2. Step 2: Convert to fraction form
    172,062.61/257,678.62 = 103,476.93/x
  3. Step 3: Cross multiply
    172,062.61x = 257,678.62 × 103,476.93
  4. Step 4: Simplify right side
    172,062.61x = 26,663,790,977.15
  5. Step 5: Solve for x
    x = 26,663,790,977.15/172,062.61
  6. Step 6: Final answer
    x = 154,965.63

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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.