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Finding the Fourth Proportional to 111,907.84, 154,432.32 and 61,606.80

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Solution

The fourth proportional to 111,907.84, 154,432.32 and 61,606.80 is: 85,017.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,907.84 : 154,432.32 = 61,606.80 : x
  2. Step 2: Convert to fraction form
    111,907.84/154,432.32 = 61,606.80/x
  3. Step 3: Cross multiply
    111,907.84x = 154,432.32 × 61,606.80
  4. Step 4: Simplify right side
    111,907.84x = 9,514,081,051.78
  5. Step 5: Solve for x
    x = 9,514,081,051.78/111,907.84
  6. Step 6: Final answer
    x = 85,017.11

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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.