Home / 57,078.50-78,765.80-31,586.28

Finding the Fourth Proportional to 57,078.50, 78,765.80 and 31,586.28

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Solution

The fourth proportional to 57,078.50, 78,765.80 and 31,586.28 is: 43,587.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,078.50 : 78,765.80 = 31,586.28 : x
  2. Step 2: Convert to fraction form
    57,078.50/78,765.80 = 31,586.28/x
  3. Step 3: Cross multiply
    57,078.50x = 78,765.80 × 31,586.28
  4. Step 4: Simplify right side
    57,078.50x = 2,487,918,613.22
  5. Step 5: Solve for x
    x = 2,487,918,613.22/57,078.50
  6. Step 6: Final answer
    x = 43,587.67

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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.