Home / 91,090.06-135,729.53-81,152.98

Finding the Fourth Proportional to 91,090.06, 135,729.53 and 81,152.98

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Solution

The fourth proportional to 91,090.06, 135,729.53 and 81,152.98 is: 120,922.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,090.06 : 135,729.53 = 81,152.98 : x
  2. Step 2: Convert to fraction form
    91,090.06/135,729.53 = 81,152.98/x
  3. Step 3: Cross multiply
    91,090.06x = 135,729.53 × 81,152.98
  4. Step 4: Simplify right side
    91,090.06x = 11,014,855,833.50
  5. Step 5: Solve for x
    x = 11,014,855,833.50/91,090.06
  6. Step 6: Final answer
    x = 120,922.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.