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Finding the Fourth Proportional to 72,005.54, 107,995.32 and 19,402.74

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Solution

The fourth proportional to 72,005.54, 107,995.32 and 19,402.74 is: 29,100.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,005.54 : 107,995.32 = 19,402.74 : x
  2. Step 2: Convert to fraction form
    72,005.54/107,995.32 = 19,402.74/x
  3. Step 3: Cross multiply
    72,005.54x = 107,995.32 × 19,402.74
  4. Step 4: Simplify right side
    72,005.54x = 2,095,405,115.18
  5. Step 5: Solve for x
    x = 2,095,405,115.18/72,005.54
  6. Step 6: Final answer
    x = 29,100.61

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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.