Home / 77,940.21-107,557.13-42,129.91

Finding the Fourth Proportional to 77,940.21, 107,557.13 and 42,129.91

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Solution

The fourth proportional to 77,940.21, 107,557.13 and 42,129.91 is: 58,139.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,940.21 : 107,557.13 = 42,129.91 : x
  2. Step 2: Convert to fraction form
    77,940.21/107,557.13 = 42,129.91/x
  3. Step 3: Cross multiply
    77,940.21x = 107,557.13 × 42,129.91
  4. Step 4: Simplify right side
    77,940.21x = 4,531,372,206.76
  5. Step 5: Solve for x
    x = 4,531,372,206.76/77,940.21
  6. Step 6: Final answer
    x = 58,139.08

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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.