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Finding the Fourth Proportional to 109,980.61, 151,772.70 and 59,679.61

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Solution

The fourth proportional to 109,980.61, 151,772.70 and 59,679.61 is: 82,357.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,980.61 : 151,772.70 = 59,679.61 : x
  2. Step 2: Convert to fraction form
    109,980.61/151,772.70 = 59,679.61/x
  3. Step 3: Cross multiply
    109,980.61x = 151,772.70 × 59,679.61
  4. Step 4: Simplify right side
    109,980.61x = 9,057,735,389.01
  5. Step 5: Solve for x
    x = 9,057,735,389.01/109,980.61
  6. Step 6: Final answer
    x = 82,357.57

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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.