Home / 77,326.14-115,989.10-21,166.72

Finding the Fourth Proportional to 77,326.14, 115,989.10 and 21,166.72

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Solution

The fourth proportional to 77,326.14, 115,989.10 and 21,166.72 is: 31,750.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,326.14 : 115,989.10 = 21,166.72 : x
  2. Step 2: Convert to fraction form
    77,326.14/115,989.10 = 21,166.72/x
  3. Step 3: Cross multiply
    77,326.14x = 115,989.10 × 21,166.72
  4. Step 4: Simplify right side
    77,326.14x = 2,455,108,459.86
  5. Step 5: Solve for x
    x = 2,455,108,459.86/77,326.14
  6. Step 6: Final answer
    x = 31,750.04

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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.