Home / 76,990.31-115,298.58-56,950.55

Finding the Fourth Proportional to 76,990.31, 115,298.58 and 56,950.55

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Solution

The fourth proportional to 76,990.31, 115,298.58 and 56,950.55 is: 85,287.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,990.31 : 115,298.58 = 56,950.55 : x
  2. Step 2: Convert to fraction form
    76,990.31/115,298.58 = 56,950.55/x
  3. Step 3: Cross multiply
    76,990.31x = 115,298.58 × 56,950.55
  4. Step 4: Simplify right side
    76,990.31x = 6,566,316,968.73
  5. Step 5: Solve for x
    x = 6,566,316,968.73/76,990.31
  6. Step 6: Final answer
    x = 85,287.58

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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.