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Finding the Fourth Proportional to 77,475.80, 106,917.90 and 43,491.80

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Solution

The fourth proportional to 77,475.80, 106,917.90 and 43,491.80 is: 60,019.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,475.80 : 106,917.90 = 43,491.80 : x
  2. Step 2: Convert to fraction form
    77,475.80/106,917.90 = 43,491.80/x
  3. Step 3: Cross multiply
    77,475.80x = 106,917.90 × 43,491.80
  4. Step 4: Simplify right side
    77,475.80x = 4,650,051,923.22
  5. Step 5: Solve for x
    x = 4,650,051,923.22/77,475.80
  6. Step 6: Final answer
    x = 60,019.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.