Home / 131,420.21-181,359.83-70,990.85

Finding the Fourth Proportional to 131,420.21, 181,359.83 and 70,990.85

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Solution

The fourth proportional to 131,420.21, 181,359.83 and 70,990.85 is: 97,967.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,420.21 : 181,359.83 = 70,990.85 : x
  2. Step 2: Convert to fraction form
    131,420.21/181,359.83 = 70,990.85/x
  3. Step 3: Cross multiply
    131,420.21x = 181,359.83 × 70,990.85
  4. Step 4: Simplify right side
    131,420.21x = 12,874,889,118.43
  5. Step 5: Solve for x
    x = 12,874,889,118.43/131,420.21
  6. Step 6: Final answer
    x = 97,967.35

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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.