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Finding the Fourth Proportional to 153.01, 210.72 and 137.53

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Solution

The fourth proportional to 153.01, 210.72 and 137.53 is: 189.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.01 : 210.72 = 137.53 : x
  2. Step 2: Convert to fraction form
    153.01/210.72 = 137.53/x
  3. Step 3: Cross multiply
    153.01x = 210.72 × 137.53
  4. Step 4: Simplify right side
    153.01x = 28,980.32
  5. Step 5: Solve for x
    x = 28,980.32/153.01
  6. Step 6: Final answer
    x = 189.40

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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.