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Finding the Fourth Proportional to 117,679.60, 162,435 and 75,238.30

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Solution

The fourth proportional to 117,679.60, 162,435 and 75,238.30 is: 103,852.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,679.60 : 162,435 = 75,238.30 : x
  2. Step 2: Convert to fraction form
    117,679.60/162,435 = 75,238.30/x
  3. Step 3: Cross multiply
    117,679.60x = 162,435 × 75,238.30
  4. Step 4: Simplify right side
    117,679.60x = 12,221,333,260.50
  5. Step 5: Solve for x
    x = 12,221,333,260.50/117,679.60
  6. Step 6: Final answer
    x = 103,852.61

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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.