Home / 78,100.28-107,778.24-42,290.40

Finding the Fourth Proportional to 78,100.28, 107,778.24 and 42,290.40

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Solution

The fourth proportional to 78,100.28, 107,778.24 and 42,290.40 is: 58,360.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,100.28 : 107,778.24 = 42,290.40 : x
  2. Step 2: Convert to fraction form
    78,100.28/107,778.24 = 42,290.40/x
  3. Step 3: Cross multiply
    78,100.28x = 107,778.24 × 42,290.40
  4. Step 4: Simplify right side
    78,100.28x = 4,557,984,880.90
  5. Step 5: Solve for x
    x = 4,557,984,880.90/78,100.28
  6. Step 6: Final answer
    x = 58,360.67

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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.