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Finding the Fourth Proportional to 60.83, 90.70 and 53.64

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Solution

The fourth proportional to 60.83, 90.70 and 53.64 is: 79.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.83 : 90.70 = 53.64 : x
  2. Step 2: Convert to fraction form
    60.83/90.70 = 53.64/x
  3. Step 3: Cross multiply
    60.83x = 90.70 × 53.64
  4. Step 4: Simplify right side
    60.83x = 4,865.15
  5. Step 5: Solve for x
    x = 4,865.15/60.83
  6. Step 6: Final answer
    x = 79.98

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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.