Home / 82,109.90-113,312.48-48,138.50

Finding the Fourth Proportional to 82,109.90, 113,312.48 and 48,138.50

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Solution

The fourth proportional to 82,109.90, 113,312.48 and 48,138.50 is: 66,431.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,109.90 : 113,312.48 = 48,138.50 : x
  2. Step 2: Convert to fraction form
    82,109.90/113,312.48 = 48,138.50/x
  3. Step 3: Cross multiply
    82,109.90x = 113,312.48 × 48,138.50
  4. Step 4: Simplify right side
    82,109.90x = 5,454,692,861.07
  5. Step 5: Solve for x
    x = 5,454,692,861.07/82,109.90
  6. Step 6: Final answer
    x = 66,431.61

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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.