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Finding the Fourth Proportional to 172,215.63, 258,276.60 and 108,940.77

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Solution

The fourth proportional to 172,215.63, 258,276.60 and 108,940.77 is: 163,381.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,215.63 : 258,276.60 = 108,940.77 : x
  2. Step 2: Convert to fraction form
    172,215.63/258,276.60 = 108,940.77/x
  3. Step 3: Cross multiply
    172,215.63x = 258,276.60 × 108,940.77
  4. Step 4: Simplify right side
    172,215.63x = 28,136,851,676.98
  5. Step 5: Solve for x
    x = 28,136,851,676.98/172,215.63
  6. Step 6: Final answer
    x = 163,381.52

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1.5x scale

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.