Home / 77,037.80-115,556.70-71,570.30

Finding the Fourth Proportional to 77,037.80, 115,556.70 and 71,570.30

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Solution

The fourth proportional to 77,037.80, 115,556.70 and 71,570.30 is: 107,355.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,037.80 : 115,556.70 = 71,570.30 : x
  2. Step 2: Convert to fraction form
    77,037.80/115,556.70 = 71,570.30/x
  3. Step 3: Cross multiply
    77,037.80x = 115,556.70 × 71,570.30
  4. Step 4: Simplify right side
    77,037.80x = 8,270,427,686.01
  5. Step 5: Solve for x
    x = 8,270,427,686.01/77,037.80
  6. Step 6: Final answer
    x = 107,355.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.