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Finding the Fourth Proportional to 149,457.60, 206,245.20 and 81,473.12

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Solution

The fourth proportional to 149,457.60, 206,245.20 and 81,473.12 is: 112,429.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,457.60 : 206,245.20 = 81,473.12 : x
  2. Step 2: Convert to fraction form
    149,457.60/206,245.20 = 81,473.12/x
  3. Step 3: Cross multiply
    149,457.60x = 206,245.20 × 81,473.12
  4. Step 4: Simplify right side
    149,457.60x = 16,803,439,929.02
  5. Step 5: Solve for x
    x = 16,803,439,929.02/149,457.60
  6. Step 6: Final answer
    x = 112,429.48

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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.