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Finding the Fourth Proportional to 86.77, 130.63 and 62.89

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Solution

The fourth proportional to 86.77, 130.63 and 62.89 is: 94.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.77 : 130.63 = 62.89 : x
  2. Step 2: Convert to fraction form
    86.77/130.63 = 62.89/x
  3. Step 3: Cross multiply
    86.77x = 130.63 × 62.89
  4. Step 4: Simplify right side
    86.77x = 8,215.32
  5. Step 5: Solve for x
    x = 8,215.32/86.77
  6. Step 6: Final answer
    x = 94.68

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.