Home / 76,828.05-105,781.45-65,320.33

Finding the Fourth Proportional to 76,828.05, 105,781.45 and 65,320.33

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Solution

The fourth proportional to 76,828.05, 105,781.45 and 65,320.33 is: 89,936.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,828.05 : 105,781.45 = 65,320.33 : x
  2. Step 2: Convert to fraction form
    76,828.05/105,781.45 = 65,320.33/x
  3. Step 3: Cross multiply
    76,828.05x = 105,781.45 × 65,320.33
  4. Step 4: Simplify right side
    76,828.05x = 6,909,679,817.81
  5. Step 5: Solve for x
    x = 6,909,679,817.81/76,828.05
  6. Step 6: Final answer
    x = 89,936.94

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1.5x scale

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.