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Finding the Fourth Proportional to 59.90, 89.78 and 48.35

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Solution

The fourth proportional to 59.90, 89.78 and 48.35 is: 72.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.90 : 89.78 = 48.35 : x
  2. Step 2: Convert to fraction form
    59.90/89.78 = 48.35/x
  3. Step 3: Cross multiply
    59.90x = 89.78 × 48.35
  4. Step 4: Simplify right side
    59.90x = 4,340.17
  5. Step 5: Solve for x
    x = 4,340.17/59.90
  6. Step 6: Final answer
    x = 72.46

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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.