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Finding the Fourth Proportional to 60.84, 90.78 and 55.68

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Solution

The fourth proportional to 60.84, 90.78 and 55.68 is: 83.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.84 : 90.78 = 55.68 : x
  2. Step 2: Convert to fraction form
    60.84/90.78 = 55.68/x
  3. Step 3: Cross multiply
    60.84x = 90.78 × 55.68
  4. Step 4: Simplify right side
    60.84x = 5,054.63
  5. Step 5: Solve for x
    x = 5,054.63/60.84
  6. Step 6: Final answer
    x = 83.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.