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Finding the Fourth Proportional to 109,747.20, 164,620.80 and 59,980.80

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Solution

The fourth proportional to 109,747.20, 164,620.80 and 59,980.80 is: 89,971.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,747.20 : 164,620.80 = 59,980.80 : x
  2. Step 2: Convert to fraction form
    109,747.20/164,620.80 = 59,980.80/x
  3. Step 3: Cross multiply
    109,747.20x = 164,620.80 × 59,980.80
  4. Step 4: Simplify right side
    109,747.20x = 9,874,087,280.64
  5. Step 5: Solve for x
    x = 9,874,087,280.64/109,747.20
  6. Step 6: Final answer
    x = 89,971.20

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1.5x scale

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.