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Finding the Fourth Proportional to 107,910.70, 161,866.05 and 65,920.30

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Solution

The fourth proportional to 107,910.70, 161,866.05 and 65,920.30 is: 98,880.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,910.70 : 161,866.05 = 65,920.30 : x
  2. Step 2: Convert to fraction form
    107,910.70/161,866.05 = 65,920.30/x
  3. Step 3: Cross multiply
    107,910.70x = 161,866.05 × 65,920.30
  4. Step 4: Simplify right side
    107,910.70x = 10,670,258,575.82
  5. Step 5: Solve for x
    x = 10,670,258,575.82/107,910.70
  6. Step 6: Final answer
    x = 98,880.45

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1.5x scale

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.