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Finding the Fourth Proportional to 172,201.80, 257,379.40 and 155,296.28

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Solution

The fourth proportional to 172,201.80, 257,379.40 and 155,296.28 is: 232,111.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,201.80 : 257,379.40 = 155,296.28 : x
  2. Step 2: Convert to fraction form
    172,201.80/257,379.40 = 155,296.28/x
  3. Step 3: Cross multiply
    172,201.80x = 257,379.40 × 155,296.28
  4. Step 4: Simplify right side
    172,201.80x = 39,970,063,368.63
  5. Step 5: Solve for x
    x = 39,970,063,368.63/172,201.80
  6. Step 6: Final answer
    x = 232,111.76

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1.5x scale

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.