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Finding the Fourth Proportional to 156.83, 215.93 and 140.63

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Solution

The fourth proportional to 156.83, 215.93 and 140.63 is: 193.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    156.83 : 215.93 = 140.63 : x
  2. Step 2: Convert to fraction form
    156.83/215.93 = 140.63/x
  3. Step 3: Cross multiply
    156.83x = 215.93 × 140.63
  4. Step 4: Simplify right side
    156.83x = 30,365.51
  5. Step 5: Solve for x
    x = 30,365.51/156.83
  6. Step 6: Final answer
    x = 193.63

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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.