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Finding the Fourth Proportional to 145.65, 200.10 and 130.31

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Solution

The fourth proportional to 145.65, 200.10 and 130.31 is: 179.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.65 : 200.10 = 130.31 : x
  2. Step 2: Convert to fraction form
    145.65/200.10 = 130.31/x
  3. Step 3: Cross multiply
    145.65x = 200.10 × 130.31
  4. Step 4: Simplify right side
    145.65x = 26,074.17
  5. Step 5: Solve for x
    x = 26,074.17/145.65
  6. Step 6: Final answer
    x = 179.02

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.