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Finding the Fourth Proportional to 78.95, 118.28 and 56.01

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Solution

The fourth proportional to 78.95, 118.28 and 56.01 is: 83.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78.95 : 118.28 = 56.01 : x
  2. Step 2: Convert to fraction form
    78.95/118.28 = 56.01/x
  3. Step 3: Cross multiply
    78.95x = 118.28 × 56.01
  4. Step 4: Simplify right side
    78.95x = 6,625.00
  5. Step 5: Solve for x
    x = 6,625.00/78.95
  6. Step 6: Final answer
    x = 83.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.