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Finding the Fourth Proportional to 118,630, 163,738.56 and 68,358.16

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Solution

The fourth proportional to 118,630, 163,738.56 and 68,358.16 is: 94,351.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,630 : 163,738.56 = 68,358.16 : x
  2. Step 2: Convert to fraction form
    118,630/163,738.56 = 68,358.16/x
  3. Step 3: Cross multiply
    118,630x = 163,738.56 × 68,358.16
  4. Step 4: Simplify right side
    118,630x = 11,192,866,682.65
  5. Step 5: Solve for x
    x = 11,192,866,682.65/118,630
  6. Step 6: Final answer
    x = 94,351.06

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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.