Home / 81,353.10-122,102.55-70,272.30

Finding the Fourth Proportional to 81,353.10, 122,102.55 and 70,272.30

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Solution

The fourth proportional to 81,353.10, 122,102.55 and 70,272.30 is: 105,471.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,353.10 : 122,102.55 = 70,272.30 : x
  2. Step 2: Convert to fraction form
    81,353.10/122,102.55 = 70,272.30/x
  3. Step 3: Cross multiply
    81,353.10x = 122,102.55 × 70,272.30
  4. Step 4: Simplify right side
    81,353.10x = 8,580,427,024.37
  5. Step 5: Solve for x
    x = 8,580,427,024.37/81,353.10
  6. Step 6: Final answer
    x = 105,471.42

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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.