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Finding the Fourth Proportional to 111,487.86, 153,842.94 and 66,158.01

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Solution

The fourth proportional to 111,487.86, 153,842.94 and 66,158.01 is: 91,291.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,487.86 : 153,842.94 = 66,158.01 : x
  2. Step 2: Convert to fraction form
    111,487.86/153,842.94 = 66,158.01/x
  3. Step 3: Cross multiply
    111,487.86x = 153,842.94 × 66,158.01
  4. Step 4: Simplify right side
    111,487.86x = 10,177,942,762.95
  5. Step 5: Solve for x
    x = 10,177,942,762.95/111,487.86
  6. Step 6: Final answer
    x = 91,291.94

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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.