Home / 100,960.04-139,325.78-55,639.64

Finding the Fourth Proportional to 100,960.04, 139,325.78 and 55,639.64

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Solution

The fourth proportional to 100,960.04, 139,325.78 and 55,639.64 is: 76,783.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,960.04 : 139,325.78 = 55,639.64 : x
  2. Step 2: Convert to fraction form
    100,960.04/139,325.78 = 55,639.64/x
  3. Step 3: Cross multiply
    100,960.04x = 139,325.78 × 55,639.64
  4. Step 4: Simplify right side
    100,960.04x = 7,752,036,312.04
  5. Step 5: Solve for x
    x = 7,752,036,312.04/100,960.04
  6. Step 6: Final answer
    x = 76,783.21

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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.