Home / 55,790.40-76,990.32-30,639.84

Finding the Fourth Proportional to 55,790.40, 76,990.32 and 30,639.84

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Solution

The fourth proportional to 55,790.40, 76,990.32 and 30,639.84 is: 42,282.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,790.40 : 76,990.32 = 30,639.84 : x
  2. Step 2: Convert to fraction form
    55,790.40/76,990.32 = 30,639.84/x
  3. Step 3: Cross multiply
    55,790.40x = 76,990.32 × 30,639.84
  4. Step 4: Simplify right side
    55,790.40x = 2,358,971,086.35
  5. Step 5: Solve for x
    x = 2,358,971,086.35/55,790.40
  6. Step 6: Final answer
    x = 42,282.74

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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.