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Finding the Fourth Proportional to 65.26, 90.03 and 48.70

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Solution

The fourth proportional to 65.26, 90.03 and 48.70 is: 67.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    65.26 : 90.03 = 48.70 : x
  2. Step 2: Convert to fraction form
    65.26/90.03 = 48.70/x
  3. Step 3: Cross multiply
    65.26x = 90.03 × 48.70
  4. Step 4: Simplify right side
    65.26x = 4,384.46
  5. Step 5: Solve for x
    x = 4,384.46/65.26
  6. Step 6: Final answer
    x = 67.18

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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.