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Finding the Fourth Proportional to 94.72, 130.64 and 70.16

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Solution

The fourth proportional to 94.72, 130.64 and 70.16 is: 96.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    94.72 : 130.64 = 70.16 : x
  2. Step 2: Convert to fraction form
    94.72/130.64 = 70.16/x
  3. Step 3: Cross multiply
    94.72x = 130.64 × 70.16
  4. Step 4: Simplify right side
    94.72x = 9,165.70
  5. Step 5: Solve for x
    x = 9,165.70/94.72
  6. Step 6: Final answer
    x = 96.77

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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.