Home / 78,111.39-117,167.10-18,946.56

Finding the Fourth Proportional to 78,111.39, 117,167.10 and 18,946.56

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Solution

The fourth proportional to 78,111.39, 117,167.10 and 18,946.56 is: 28,419.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,111.39 : 117,167.10 = 18,946.56 : x
  2. Step 2: Convert to fraction form
    78,111.39/117,167.10 = 18,946.56/x
  3. Step 3: Cross multiply
    78,111.39x = 117,167.10 × 18,946.56
  4. Step 4: Simplify right side
    78,111.39x = 2,219,913,490.18
  5. Step 5: Solve for x
    x = 2,219,913,490.18/78,111.39
  6. Step 6: Final answer
    x = 28,419.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.