Home / 101,988.20-140,739.14-56,669.36

Finding the Fourth Proportional to 101,988.20, 140,739.14 and 56,669.36

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Solution

The fourth proportional to 101,988.20, 140,739.14 and 56,669.36 is: 78,201.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,988.20 : 140,739.14 = 56,669.36 : x
  2. Step 2: Convert to fraction form
    101,988.20/140,739.14 = 56,669.36/x
  3. Step 3: Cross multiply
    101,988.20x = 140,739.14 × 56,669.36
  4. Step 4: Simplify right side
    101,988.20x = 7,975,596,990.75
  5. Step 5: Solve for x
    x = 7,975,596,990.75/101,988.20
  6. Step 6: Final answer
    x = 78,201.17

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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.