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Finding the Fourth Proportional to 46.77, 70.12 and 19.70

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Solution

The fourth proportional to 46.77, 70.12 and 19.70 is: 29.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    46.77 : 70.12 = 19.70 : x
  2. Step 2: Convert to fraction form
    46.77/70.12 = 19.70/x
  3. Step 3: Cross multiply
    46.77x = 70.12 × 19.70
  4. Step 4: Simplify right side
    46.77x = 1,381.36
  5. Step 5: Solve for x
    x = 1,381.36/46.77
  6. Step 6: Final answer
    x = 29.54

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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.