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Finding the Fourth Proportional to 112,212, 154,852.56 and 61,911

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Solution

The fourth proportional to 112,212, 154,852.56 and 61,911 is: 85,437.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,212 : 154,852.56 = 61,911 : x
  2. Step 2: Convert to fraction form
    112,212/154,852.56 = 61,911/x
  3. Step 3: Cross multiply
    112,212x = 154,852.56 × 61,911
  4. Step 4: Simplify right side
    112,212x = 9,587,076,842.16
  5. Step 5: Solve for x
    x = 9,587,076,842.16/112,212
  6. Step 6: Final answer
    x = 85,437.18

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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.