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Finding the Fourth Proportional to 72,443.63, 108,665.45 and 19,853.57

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Solution

The fourth proportional to 72,443.63, 108,665.45 and 19,853.57 is: 29,780.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,443.63 : 108,665.45 = 19,853.57 : x
  2. Step 2: Convert to fraction form
    72,443.63/108,665.45 = 19,853.57/x
  3. Step 3: Cross multiply
    72,443.63x = 108,665.45 × 19,853.57
  4. Step 4: Simplify right side
    72,443.63x = 2,157,397,118.16
  5. Step 5: Solve for x
    x = 2,157,397,118.16/72,443.63
  6. Step 6: Final answer
    x = 29,780.36

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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.