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Finding the Fourth Proportional to 114.01, 157.18 and 90.77

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Solution

The fourth proportional to 114.01, 157.18 and 90.77 is: 125.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    114.01 : 157.18 = 90.77 : x
  2. Step 2: Convert to fraction form
    114.01/157.18 = 90.77/x
  3. Step 3: Cross multiply
    114.01x = 157.18 × 90.77
  4. Step 4: Simplify right side
    114.01x = 14,266.77
  5. Step 5: Solve for x
    x = 14,266.77/114.01
  6. Step 6: Final answer
    x = 125.14

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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.