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Finding the Fourth Proportional to 77,665.21, 107,152.21 and 63,300.37

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Solution

The fourth proportional to 77,665.21, 107,152.21 and 63,300.37 is: 87,333.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,665.21 : 107,152.21 = 63,300.37 : x
  2. Step 2: Convert to fraction form
    77,665.21/107,152.21 = 63,300.37/x
  3. Step 3: Cross multiply
    77,665.21x = 107,152.21 × 63,300.37
  4. Step 4: Simplify right side
    77,665.21x = 6,782,773,687.05
  5. Step 5: Solve for x
    x = 6,782,773,687.05/77,665.21
  6. Step 6: Final answer
    x = 87,333.49

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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.