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Finding the Fourth Proportional to 72.55, 108.40 and 49.53

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Solution

The fourth proportional to 72.55, 108.40 and 49.53 is: 74.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    72.55 : 108.40 = 49.53 : x
  2. Step 2: Convert to fraction form
    72.55/108.40 = 49.53/x
  3. Step 3: Cross multiply
    72.55x = 108.40 × 49.53
  4. Step 4: Simplify right side
    72.55x = 5,368.26
  5. Step 5: Solve for x
    x = 5,368.26/72.55
  6. Step 6: Final answer
    x = 74.00

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.