Home / 76,866.64-115,312.06-20,708.93

Finding the Fourth Proportional to 76,866.64, 115,312.06 and 20,708.93

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Solution

The fourth proportional to 76,866.64, 115,312.06 and 20,708.93 is: 31,066.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,866.64 : 115,312.06 = 20,708.93 : x
  2. Step 2: Convert to fraction form
    76,866.64/115,312.06 = 20,708.93/x
  3. Step 3: Cross multiply
    76,866.64x = 115,312.06 × 20,708.93
  4. Step 4: Simplify right side
    76,866.64x = 2,387,989,576.37
  5. Step 5: Solve for x
    x = 2,387,989,576.37/76,866.64
  6. Step 6: Final answer
    x = 31,066.66

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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.