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Finding the Fourth Proportional to 97.23, 145.89 and 56.70

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Solution

The fourth proportional to 97.23, 145.89 and 56.70 is: 85.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    97.23 : 145.89 = 56.70 : x
  2. Step 2: Convert to fraction form
    97.23/145.89 = 56.70/x
  3. Step 3: Cross multiply
    97.23x = 145.89 × 56.70
  4. Step 4: Simplify right side
    97.23x = 8,271.96
  5. Step 5: Solve for x
    x = 8,271.96/97.23
  6. Step 6: Final answer
    x = 85.08

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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.