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Finding the Fourth Proportional to 111,586.50, 153,991.80 and 61,285.50

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Solution

The fourth proportional to 111,586.50, 153,991.80 and 61,285.50 is: 84,575.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,586.50 : 153,991.80 = 61,285.50 : x
  2. Step 2: Convert to fraction form
    111,586.50/153,991.80 = 61,285.50/x
  3. Step 3: Cross multiply
    111,586.50x = 153,991.80 × 61,285.50
  4. Step 4: Simplify right side
    111,586.50x = 9,437,464,458.90
  5. Step 5: Solve for x
    x = 9,437,464,458.90/111,586.50
  6. Step 6: Final answer
    x = 84,575.32

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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.