Home / 128,837.80-193,271.10-40,090.60

Finding the Fourth Proportional to 128,837.80, 193,271.10 and 40,090.60

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Solution

The fourth proportional to 128,837.80, 193,271.10 and 40,090.60 is: 60,140.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,837.80 : 193,271.10 = 40,090.60 : x
  2. Step 2: Convert to fraction form
    128,837.80/193,271.10 = 40,090.60/x
  3. Step 3: Cross multiply
    128,837.80x = 193,271.10 × 40,090.60
  4. Step 4: Simplify right side
    128,837.80x = 7,748,354,361.66
  5. Step 5: Solve for x
    x = 7,748,354,361.66/128,837.80
  6. Step 6: Final answer
    x = 60,140.38

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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.