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Finding the Fourth Proportional to 130.61, 180.38 and 107.53

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Solution

The fourth proportional to 130.61, 180.38 and 107.53 is: 148.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.61 : 180.38 = 107.53 : x
  2. Step 2: Convert to fraction form
    130.61/180.38 = 107.53/x
  3. Step 3: Cross multiply
    130.61x = 180.38 × 107.53
  4. Step 4: Simplify right side
    130.61x = 19,395.47
  5. Step 5: Solve for x
    x = 19,395.47/130.61
  6. Step 6: Final answer
    x = 148.50

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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.