Home / 78,857.05-117,682.10-70,442.56

Finding the Fourth Proportional to 78,857.05, 117,682.10 and 70,442.56

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Solution

The fourth proportional to 78,857.05, 117,682.10 and 70,442.56 is: 105,124.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,857.05 : 117,682.10 = 70,442.56 : x
  2. Step 2: Convert to fraction form
    78,857.05/117,682.10 = 70,442.56/x
  3. Step 3: Cross multiply
    78,857.05x = 117,682.10 × 70,442.56
  4. Step 4: Simplify right side
    78,857.05x = 8,289,828,037.96
  5. Step 5: Solve for x
    x = 8,289,828,037.96/78,857.05
  6. Step 6: Final answer
    x = 105,124.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.