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Finding the Fourth Proportional to 66,491.80, 99,737.70 and 51,620.20

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Solution

The fourth proportional to 66,491.80, 99,737.70 and 51,620.20 is: 77,430.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,491.80 : 99,737.70 = 51,620.20 : x
  2. Step 2: Convert to fraction form
    66,491.80/99,737.70 = 51,620.20/x
  3. Step 3: Cross multiply
    66,491.80x = 99,737.70 × 51,620.20
  4. Step 4: Simplify right side
    66,491.80x = 5,148,480,021.54
  5. Step 5: Solve for x
    x = 5,148,480,021.54/66,491.80
  6. Step 6: Final answer
    x = 77,430.30

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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.