Home / 76,973.84-105,816.16-66,178.96

Finding the Fourth Proportional to 76,973.84, 105,816.16 and 66,178.96

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Solution

The fourth proportional to 76,973.84, 105,816.16 and 66,178.96 is: 90,976.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,973.84 : 105,816.16 = 66,178.96 : x
  2. Step 2: Convert to fraction form
    76,973.84/105,816.16 = 66,178.96/x
  3. Step 3: Cross multiply
    76,973.84x = 105,816.16 × 66,178.96
  4. Step 4: Simplify right side
    76,973.84x = 7,002,803,419.99
  5. Step 5: Solve for x
    x = 7,002,803,419.99/76,973.84
  6. Step 6: Final answer
    x = 90,976.41

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.