Home / 55,611.42-76,778.64-42,840.57

Finding the Fourth Proportional to 55,611.42, 76,778.64 and 42,840.57

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Solution

The fourth proportional to 55,611.42, 76,778.64 and 42,840.57 is: 59,146.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,611.42 : 76,778.64 = 42,840.57 : x
  2. Step 2: Convert to fraction form
    55,611.42/76,778.64 = 42,840.57/x
  3. Step 3: Cross multiply
    55,611.42x = 76,778.64 × 42,840.57
  4. Step 4: Simplify right side
    55,611.42x = 3,289,240,701.42
  5. Step 5: Solve for x
    x = 3,289,240,701.42/55,611.42
  6. Step 6: Final answer
    x = 59,146.86

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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.