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Finding the Fourth Proportional to 70.61, 106.41 and 59.47

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Solution

The fourth proportional to 70.61, 106.41 and 59.47 is: 89.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    70.61 : 106.41 = 59.47 : x
  2. Step 2: Convert to fraction form
    70.61/106.41 = 59.47/x
  3. Step 3: Cross multiply
    70.61x = 106.41 × 59.47
  4. Step 4: Simplify right side
    70.61x = 6,328.16
  5. Step 5: Solve for x
    x = 6,328.16/70.61
  6. Step 6: Final answer
    x = 89.63

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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.