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Finding the Fourth Proportional to 145.34, 200.55 and 112.84

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Solution

The fourth proportional to 145.34, 200.55 and 112.84 is: 155.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.34 : 200.55 = 112.84 : x
  2. Step 2: Convert to fraction form
    145.34/200.55 = 112.84/x
  3. Step 3: Cross multiply
    145.34x = 200.55 × 112.84
  4. Step 4: Simplify right side
    145.34x = 22,630.79
  5. Step 5: Solve for x
    x = 22,630.79/145.34
  6. Step 6: Final answer
    x = 155.70

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