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Finding the Fourth Proportional to 60.43, 90.21 and 56.38

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Solution

The fourth proportional to 60.43, 90.21 and 56.38 is: 84.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.43 : 90.21 = 56.38 : x
  2. Step 2: Convert to fraction form
    60.43/90.21 = 56.38/x
  3. Step 3: Cross multiply
    60.43x = 90.21 × 56.38
  4. Step 4: Simplify right side
    60.43x = 5,085.76
  5. Step 5: Solve for x
    x = 5,085.76/60.43
  6. Step 6: Final answer
    x = 84.16

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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.