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Finding the Fourth Proportional to 111,271.50, 153,554.67 and 66,559.50

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Solution

The fourth proportional to 111,271.50, 153,554.67 and 66,559.50 is: 91,852.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,271.50 : 153,554.67 = 66,559.50 : x
  2. Step 2: Convert to fraction form
    111,271.50/153,554.67 = 66,559.50/x
  3. Step 3: Cross multiply
    111,271.50x = 153,554.67 × 66,559.50
  4. Step 4: Simplify right side
    111,271.50x = 10,220,522,057.87
  5. Step 5: Solve for x
    x = 10,220,522,057.87/111,271.50
  6. Step 6: Final answer
    x = 91,852.11

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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.