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Finding the Fourth Proportional to 109,681.62, 151,352.19 and 61,939.14

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Solution

The fourth proportional to 109,681.62, 151,352.19 and 61,939.14 is: 85,471.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,681.62 : 151,352.19 = 61,939.14 : x
  2. Step 2: Convert to fraction form
    109,681.62/151,352.19 = 61,939.14/x
  3. Step 3: Cross multiply
    109,681.62x = 151,352.19 × 61,939.14
  4. Step 4: Simplify right side
    109,681.62x = 9,374,624,485.72
  5. Step 5: Solve for x
    x = 9,374,624,485.72/109,681.62
  6. Step 6: Final answer
    x = 85,471.24

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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.