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Finding the Fourth Proportional to 91,820.80, 137,536.80 and 80,156.80

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Solution

The fourth proportional to 91,820.80, 137,536.80 and 80,156.80 is: 120,065.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,820.80 : 137,536.80 = 80,156.80 : x
  2. Step 2: Convert to fraction form
    91,820.80/137,536.80 = 80,156.80/x
  3. Step 3: Cross multiply
    91,820.80x = 137,536.80 × 80,156.80
  4. Step 4: Simplify right side
    91,820.80x = 11,024,509,770.24
  5. Step 5: Solve for x
    x = 11,024,509,770.24/91,820.80
  6. Step 6: Final answer
    x = 120,065.49

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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.