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Finding the Fourth Proportional to 58.10, 87.16 and 19.59

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Solution

The fourth proportional to 58.10, 87.16 and 19.59 is: 29.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.10 : 87.16 = 19.59 : x
  2. Step 2: Convert to fraction form
    58.10/87.16 = 19.59/x
  3. Step 3: Cross multiply
    58.10x = 87.16 × 19.59
  4. Step 4: Simplify right side
    58.10x = 1,707.46
  5. Step 5: Solve for x
    x = 1,707.46/58.10
  6. Step 6: Final answer
    x = 29.39

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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.