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Finding the Fourth Proportional to 130.56, 180 and 114.08

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Solution

The fourth proportional to 130.56, 180 and 114.08 is: 157.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.56 : 180 = 114.08 : x
  2. Step 2: Convert to fraction form
    130.56/180 = 114.08/x
  3. Step 3: Cross multiply
    130.56x = 180 × 114.08
  4. Step 4: Simplify right side
    130.56x = 20,534.40
  5. Step 5: Solve for x
    x = 20,534.40/130.56
  6. Step 6: Final answer
    x = 157.28

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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.