Home / 55,790.30-76,991.16-30,639.80

Finding the Fourth Proportional to 55,790.30, 76,991.16 and 30,639.80

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Solution

The fourth proportional to 55,790.30, 76,991.16 and 30,639.80 is: 42,283.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,790.30 : 76,991.16 = 30,639.80 : x
  2. Step 2: Convert to fraction form
    55,790.30/76,991.16 = 30,639.80/x
  3. Step 3: Cross multiply
    55,790.30x = 76,991.16 × 30,639.80
  4. Step 4: Simplify right side
    55,790.30x = 2,358,993,359.21
  5. Step 5: Solve for x
    x = 2,358,993,359.21/55,790.30
  6. Step 6: Final answer
    x = 42,283.22

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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.