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Finding the Fourth Proportional to 86.65, 130.03 and 35.39

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Solution

The fourth proportional to 86.65, 130.03 and 35.39 is: 53.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    86.65 : 130.03 = 35.39 : x
  2. Step 2: Convert to fraction form
    86.65/130.03 = 35.39/x
  3. Step 3: Cross multiply
    86.65x = 130.03 × 35.39
  4. Step 4: Simplify right side
    86.65x = 4,602.00
  5. Step 5: Solve for x
    x = 4,602.00/86.65
  6. Step 6: Final answer
    x = 53.11

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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.