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Finding the Fourth Proportional to 60.70, 83.80 and 59.45

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Solution

The fourth proportional to 60.70, 83.80 and 59.45 is: 82.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.70 : 83.80 = 59.45 : x
  2. Step 2: Convert to fraction form
    60.70/83.80 = 59.45/x
  3. Step 3: Cross multiply
    60.70x = 83.80 × 59.45
  4. Step 4: Simplify right side
    60.70x = 4,981.43
  5. Step 5: Solve for x
    x = 4,981.43/60.70
  6. Step 6: Final answer
    x = 82.07

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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.