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Finding the Fourth Proportional to 90,472.42, 135,582.21 and 77,075.62

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Solution

The fourth proportional to 90,472.42, 135,582.21 and 77,075.62 is: 115,505.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,472.42 : 135,582.21 = 77,075.62 : x
  2. Step 2: Convert to fraction form
    90,472.42/135,582.21 = 77,075.62/x
  3. Step 3: Cross multiply
    90,472.42x = 135,582.21 × 77,075.62
  4. Step 4: Simplify right side
    90,472.42x = 10,450,082,896.72
  5. Step 5: Solve for x
    x = 10,450,082,896.72/90,472.42
  6. Step 6: Final answer
    x = 115,505.73

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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.