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Finding the Fourth Proportional to 159,274.68, 219,707.64 and 99,555

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Solution

The fourth proportional to 159,274.68, 219,707.64 and 99,555 is: 137,328.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,274.68 : 219,707.64 = 99,555 : x
  2. Step 2: Convert to fraction form
    159,274.68/219,707.64 = 99,555/x
  3. Step 3: Cross multiply
    159,274.68x = 219,707.64 × 99,555
  4. Step 4: Simplify right side
    159,274.68x = 21,872,994,100.20
  5. Step 5: Solve for x
    x = 21,872,994,100.20/159,274.68
  6. Step 6: Final answer
    x = 137,328.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.