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Finding the Fourth Proportional to 132,695.40, 183,134.78 and 78,980.60

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Solution

The fourth proportional to 132,695.40, 183,134.78 and 78,980.60 is: 109,002.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,695.40 : 183,134.78 = 78,980.60 : x
  2. Step 2: Convert to fraction form
    132,695.40/183,134.78 = 78,980.60/x
  3. Step 3: Cross multiply
    132,695.40x = 183,134.78 × 78,980.60
  4. Step 4: Simplify right side
    132,695.40x = 14,464,093,494.69
  5. Step 5: Solve for x
    x = 14,464,093,494.69/132,695.40
  6. Step 6: Final answer
    x = 109,002.22

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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.