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Finding the Fourth Proportional to 58.50, 80.70 and 53.88

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Solution

The fourth proportional to 58.50, 80.70 and 53.88 is: 74.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.50 : 80.70 = 53.88 : x
  2. Step 2: Convert to fraction form
    58.50/80.70 = 53.88/x
  3. Step 3: Cross multiply
    58.50x = 80.70 × 53.88
  4. Step 4: Simplify right side
    58.50x = 4,348.12
  5. Step 5: Solve for x
    x = 4,348.12/58.50
  6. Step 6: Final answer
    x = 74.33

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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.