Home / 80,981.34-111,756.39-45,178.32

Finding the Fourth Proportional to 80,981.34, 111,756.39 and 45,178.32

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Solution

The fourth proportional to 80,981.34, 111,756.39 and 45,178.32 is: 62,347.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,981.34 : 111,756.39 = 45,178.32 : x
  2. Step 2: Convert to fraction form
    80,981.34/111,756.39 = 45,178.32/x
  3. Step 3: Cross multiply
    80,981.34x = 111,756.39 × 45,178.32
  4. Step 4: Simplify right side
    80,981.34x = 5,048,965,949.46
  5. Step 5: Solve for x
    x = 5,048,965,949.46/80,981.34
  6. Step 6: Final answer
    x = 62,347.28

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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.