Home / 90,783.70-136,321.35-68,622.10

Finding the Fourth Proportional to 90,783.70, 136,321.35 and 68,622.10

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Solution

The fourth proportional to 90,783.70, 136,321.35 and 68,622.10 is: 103,043.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,783.70 : 136,321.35 = 68,622.10 : x
  2. Step 2: Convert to fraction form
    90,783.70/136,321.35 = 68,622.10/x
  3. Step 3: Cross multiply
    90,783.70x = 136,321.35 × 68,622.10
  4. Step 4: Simplify right side
    90,783.70x = 9,354,657,311.84
  5. Step 5: Solve for x
    x = 9,354,657,311.84/90,783.70
  6. Step 6: Final answer
    x = 103,043.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.