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Finding the Fourth Proportional to 90,240.80, 135,166.80 and 74,688.80

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Solution

The fourth proportional to 90,240.80, 135,166.80 and 74,688.80 is: 111,872.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,240.80 : 135,166.80 = 74,688.80 : x
  2. Step 2: Convert to fraction form
    90,240.80/135,166.80 = 74,688.80/x
  3. Step 3: Cross multiply
    90,240.80x = 135,166.80 × 74,688.80
  4. Step 4: Simplify right side
    90,240.80x = 10,095,446,091.84
  5. Step 5: Solve for x
    x = 10,095,446,091.84/90,240.80
  6. Step 6: Final answer
    x = 111,872.30

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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.