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Finding the Fourth Proportional to 172,496.08, 258,656.60 and 78,921.64

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Solution

The fourth proportional to 172,496.08, 258,656.60 and 78,921.64 is: 118,342.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,496.08 : 258,656.60 = 78,921.64 : x
  2. Step 2: Convert to fraction form
    172,496.08/258,656.60 = 78,921.64/x
  3. Step 3: Cross multiply
    172,496.08x = 258,656.60 × 78,921.64
  4. Step 4: Simplify right side
    172,496.08x = 20,413,603,068.82
  5. Step 5: Solve for x
    x = 20,413,603,068.82/172,496.08
  6. Step 6: Final answer
    x = 118,342.42

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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.