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Finding the Fourth Proportional to 145.10, 200 and 115.14

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Solution

The fourth proportional to 145.10, 200 and 115.14 is: 158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.10 : 200 = 115.14 : x
  2. Step 2: Convert to fraction form
    145.10/200 = 115.14/x
  3. Step 3: Cross multiply
    145.10x = 200 × 115.14
  4. Step 4: Simplify right side
    145.10x = 23,028
  5. Step 5: Solve for x
    x = 23,028/145.10
  6. Step 6: Final answer
    x = 158.70

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1.5x scale

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.