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Finding the Fourth Proportional to 153,792, 212,245.92 and 86,736.96

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Solution

The fourth proportional to 153,792, 212,245.92 and 86,736.96 is: 119,704.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,792 : 212,245.92 = 86,736.96 : x
  2. Step 2: Convert to fraction form
    153,792/212,245.92 = 86,736.96/x
  3. Step 3: Cross multiply
    153,792x = 212,245.92 × 86,736.96
  4. Step 4: Simplify right side
    153,792x = 18,409,565,873.20
  5. Step 5: Solve for x
    x = 18,409,565,873.20/153,792
  6. Step 6: Final answer
    x = 119,704.31

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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.