Home / 129,625.40-178,827.36-78,618.64

Finding the Fourth Proportional to 129,625.40, 178,827.36 and 78,618.64

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Solution

The fourth proportional to 129,625.40, 178,827.36 and 78,618.64 is: 108,459.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,625.40 : 178,827.36 = 78,618.64 : x
  2. Step 2: Convert to fraction form
    129,625.40/178,827.36 = 78,618.64/x
  3. Step 3: Cross multiply
    129,625.40x = 178,827.36 × 78,618.64
  4. Step 4: Simplify right side
    129,625.40x = 14,059,163,837.99
  5. Step 5: Solve for x
    x = 14,059,163,837.99/129,625.40
  6. Step 6: Final answer
    x = 108,459.95

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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.