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Finding the Fourth Proportional to 93.98, 129.72 and 62.98

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Solution

The fourth proportional to 93.98, 129.72 and 62.98 is: 86.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    93.98 : 129.72 = 62.98 : x
  2. Step 2: Convert to fraction form
    93.98/129.72 = 62.98/x
  3. Step 3: Cross multiply
    93.98x = 129.72 × 62.98
  4. Step 4: Simplify right side
    93.98x = 8,169.77
  5. Step 5: Solve for x
    x = 8,169.77/93.98
  6. Step 6: Final answer
    x = 86.93

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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.