Home / 79,123.45-109,193.40-45,137.47

Finding the Fourth Proportional to 79,123.45, 109,193.40 and 45,137.47

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Solution

The fourth proportional to 79,123.45, 109,193.40 and 45,137.47 is: 62,291.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,123.45 : 109,193.40 = 45,137.47 : x
  2. Step 2: Convert to fraction form
    79,123.45/109,193.40 = 45,137.47/x
  3. Step 3: Cross multiply
    79,123.45x = 109,193.40 × 45,137.47
  4. Step 4: Simplify right side
    79,123.45x = 4,928,713,816.70
  5. Step 5: Solve for x
    x = 4,928,713,816.70/79,123.45
  6. Step 6: Final answer
    x = 62,291.44

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1.5x scale

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.