Home / 76,974.90-106,298.64-72,781.53

Finding the Fourth Proportional to 76,974.90, 106,298.64 and 72,781.53

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Solution

The fourth proportional to 76,974.90, 106,298.64 and 72,781.53 is: 100,507.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,974.90 : 106,298.64 = 72,781.53 : x
  2. Step 2: Convert to fraction form
    76,974.90/106,298.64 = 72,781.53/x
  3. Step 3: Cross multiply
    76,974.90x = 106,298.64 × 72,781.53
  4. Step 4: Simplify right side
    76,974.90x = 7,736,577,656.12
  5. Step 5: Solve for x
    x = 7,736,577,656.12/76,974.90
  6. Step 6: Final answer
    x = 100,507.80

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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.