Home / 74,778.18-103,140.99-47,928.30

Finding the Fourth Proportional to 74,778.18, 103,140.99 and 47,928.30

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Solution

The fourth proportional to 74,778.18, 103,140.99 and 47,928.30 is: 66,107.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,778.18 : 103,140.99 = 47,928.30 : x
  2. Step 2: Convert to fraction form
    74,778.18/103,140.99 = 47,928.30/x
  3. Step 3: Cross multiply
    74,778.18x = 103,140.99 × 47,928.30
  4. Step 4: Simplify right side
    74,778.18x = 4,943,372,311.02
  5. Step 5: Solve for x
    x = 4,943,372,311.02/74,778.18
  6. Step 6: Final answer
    x = 66,107.15

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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.