Home / 149,385.21-206,148.90-81,402.76

Finding the Fourth Proportional to 149,385.21, 206,148.90 and 81,402.76

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Solution

The fourth proportional to 149,385.21, 206,148.90 and 81,402.76 is: 112,334.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,385.21 : 206,148.90 = 81,402.76 : x
  2. Step 2: Convert to fraction form
    149,385.21/206,148.90 = 81,402.76/x
  3. Step 3: Cross multiply
    149,385.21x = 206,148.90 × 81,402.76
  4. Step 4: Simplify right side
    149,385.21x = 16,781,089,430.96
  5. Step 5: Solve for x
    x = 16,781,089,430.96/149,385.21
  6. Step 6: Final answer
    x = 112,334.34

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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.