Home / 76,875.27-115,303.37-20,719.77

Finding the Fourth Proportional to 76,875.27, 115,303.37 and 20,719.77

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Solution

The fourth proportional to 76,875.27, 115,303.37 and 20,719.77 is: 31,077.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,875.27 : 115,303.37 = 20,719.77 : x
  2. Step 2: Convert to fraction form
    76,875.27/115,303.37 = 20,719.77/x
  3. Step 3: Cross multiply
    76,875.27x = 115,303.37 × 20,719.77
  4. Step 4: Simplify right side
    76,875.27x = 2,389,059,203.03
  5. Step 5: Solve for x
    x = 2,389,059,203.03/76,875.27
  6. Step 6: Final answer
    x = 31,077.08

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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.