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Finding the Fourth Proportional to 72,478.44, 108,717.72 and 19,888.32

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Solution

The fourth proportional to 72,478.44, 108,717.72 and 19,888.32 is: 29,832.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,478.44 : 108,717.72 = 19,888.32 : x
  2. Step 2: Convert to fraction form
    72,478.44/108,717.72 = 19,888.32/x
  3. Step 3: Cross multiply
    72,478.44x = 108,717.72 × 19,888.32
  4. Step 4: Simplify right side
    72,478.44x = 2,162,212,805.03
  5. Step 5: Solve for x
    x = 2,162,212,805.03/72,478.44
  6. Step 6: Final answer
    x = 29,832.50

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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.