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Finding the Fourth Proportional to 77,570.09, 107,039.16 and 43,570.88

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Solution

The fourth proportional to 77,570.09, 107,039.16 and 43,570.88 is: 60,123.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,570.09 : 107,039.16 = 43,570.88 : x
  2. Step 2: Convert to fraction form
    77,570.09/107,039.16 = 43,570.88/x
  3. Step 3: Cross multiply
    77,570.09x = 107,039.16 × 43,570.88
  4. Step 4: Simplify right side
    77,570.09x = 4,663,789,860.47
  5. Step 5: Solve for x
    x = 4,663,789,860.47/77,570.09
  6. Step 6: Final answer
    x = 60,123.56

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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.