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Finding the Fourth Proportional to 77,615.28, 107,107.80 and 43,158.64

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Solution

The fourth proportional to 77,615.28, 107,107.80 and 43,158.64 is: 59,558.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,615.28 : 107,107.80 = 43,158.64 : x
  2. Step 2: Convert to fraction form
    77,615.28/107,107.80 = 43,158.64/x
  3. Step 3: Cross multiply
    77,615.28x = 107,107.80 × 43,158.64
  4. Step 4: Simplify right side
    77,615.28x = 4,622,626,821.52
  5. Step 5: Solve for x
    x = 4,622,626,821.52/77,615.28
  6. Step 6: Final answer
    x = 59,558.21

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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.