Home / 149,090.16-205,748.28-81,111.36

Finding the Fourth Proportional to 149,090.16, 205,748.28 and 81,111.36

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Solution

The fourth proportional to 149,090.16, 205,748.28 and 81,111.36 is: 111,935.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,090.16 : 205,748.28 = 81,111.36 : x
  2. Step 2: Convert to fraction form
    149,090.16/205,748.28 = 81,111.36/x
  3. Step 3: Cross multiply
    149,090.16x = 205,748.28 × 81,111.36
  4. Step 4: Simplify right side
    149,090.16x = 16,688,522,808.46
  5. Step 5: Solve for x
    x = 16,688,522,808.46/149,090.16
  6. Step 6: Final answer
    x = 111,935.78

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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.