Home / 91,070.42-135,893.30-81,614.06

Finding the Fourth Proportional to 91,070.42, 135,893.30 and 81,614.06

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Solution

The fourth proportional to 91,070.42, 135,893.30 and 81,614.06 is: 121,782.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,070.42 : 135,893.30 = 81,614.06 : x
  2. Step 2: Convert to fraction form
    91,070.42/135,893.30 = 81,614.06/x
  3. Step 3: Cross multiply
    91,070.42x = 135,893.30 × 81,614.06
  4. Step 4: Simplify right side
    91,070.42x = 11,090,803,939.80
  5. Step 5: Solve for x
    x = 11,090,803,939.80/91,070.42
  6. Step 6: Final answer
    x = 121,782.73

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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.