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Finding the Fourth Proportional to 156,978.95, 235,172.12 and 92,745.43

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Solution

The fourth proportional to 156,978.95, 235,172.12 and 92,745.43 is: 138,943.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,978.95 : 235,172.12 = 92,745.43 : x
  2. Step 2: Convert to fraction form
    156,978.95/235,172.12 = 92,745.43/x
  3. Step 3: Cross multiply
    156,978.95x = 235,172.12 × 92,745.43
  4. Step 4: Simplify right side
    156,978.95x = 21,811,139,264.02
  5. Step 5: Solve for x
    x = 21,811,139,264.02/156,978.95
  6. Step 6: Final answer
    x = 138,943.08

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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.