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Finding the Fourth Proportional to 60,778.60, 91,208.68 and 21,335.84

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Solution

The fourth proportional to 60,778.60, 91,208.68 and 21,335.84 is: 32,018.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,778.60 : 91,208.68 = 21,335.84 : x
  2. Step 2: Convert to fraction form
    60,778.60/91,208.68 = 21,335.84/x
  3. Step 3: Cross multiply
    60,778.60x = 91,208.68 × 21,335.84
  4. Step 4: Simplify right side
    60,778.60x = 1,946,013,803.09
  5. Step 5: Solve for x
    x = 1,946,013,803.09/60,778.60
  6. Step 6: Final answer
    x = 32,018.08

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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.