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Finding the Fourth Proportional to 120,810.80, 180,857.80 and 89,783.60

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Solution

The fourth proportional to 120,810.80, 180,857.80 and 89,783.60 is: 134,409.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,810.80 : 180,857.80 = 89,783.60 : x
  2. Step 2: Convert to fraction form
    120,810.80/180,857.80 = 89,783.60/x
  3. Step 3: Cross multiply
    120,810.80x = 180,857.80 × 89,783.60
  4. Step 4: Simplify right side
    120,810.80x = 16,238,064,372.08
  5. Step 5: Solve for x
    x = 16,238,064,372.08/120,810.80
  6. Step 6: Final answer
    x = 134,409.05

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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.