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Finding the Fourth Proportional to 111,957.50, 154,506.34 and 66,018.98

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Solution

The fourth proportional to 111,957.50, 154,506.34 and 66,018.98 is: 91,109.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,957.50 : 154,506.34 = 66,018.98 : x
  2. Step 2: Convert to fraction form
    111,957.50/154,506.34 = 66,018.98/x
  3. Step 3: Cross multiply
    111,957.50x = 154,506.34 × 66,018.98
  4. Step 4: Simplify right side
    111,957.50x = 10,200,350,970.33
  5. Step 5: Solve for x
    x = 10,200,350,970.33/111,957.50
  6. Step 6: Final answer
    x = 91,109.13

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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.