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Finding the Fourth Proportional to 172,090.08, 258,146.50 and 45,728.52

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Solution

The fourth proportional to 172,090.08, 258,146.50 and 45,728.52 is: 68,595.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,090.08 : 258,146.50 = 45,728.52 : x
  2. Step 2: Convert to fraction form
    172,090.08/258,146.50 = 45,728.52/x
  3. Step 3: Cross multiply
    172,090.08x = 258,146.50 × 45,728.52
  4. Step 4: Simplify right side
    172,090.08x = 11,804,657,388.18
  5. Step 5: Solve for x
    x = 11,804,657,388.18/172,090.08
  6. Step 6: Final answer
    x = 68,595.80

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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.