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Finding the Fourth Proportional to 145.26, 200.51 and 90.05

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Solution

The fourth proportional to 145.26, 200.51 and 90.05 is: 124.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    145.26 : 200.51 = 90.05 : x
  2. Step 2: Convert to fraction form
    145.26/200.51 = 90.05/x
  3. Step 3: Cross multiply
    145.26x = 200.51 × 90.05
  4. Step 4: Simplify right side
    145.26x = 18,054.81
  5. Step 5: Solve for x
    x = 18,054.81/145.26
  6. Step 6: Final answer
    x = 124.29

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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.