Home / 105,090.37-145,028.20-57,346.34

Finding the Fourth Proportional to 105,090.37, 145,028.20 and 57,346.34

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Solution

The fourth proportional to 105,090.37, 145,028.20 and 57,346.34 is: 79,139.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,090.37 : 145,028.20 = 57,346.34 : x
  2. Step 2: Convert to fraction form
    105,090.37/145,028.20 = 57,346.34/x
  3. Step 3: Cross multiply
    105,090.37x = 145,028.20 × 57,346.34
  4. Step 4: Simplify right side
    105,090.37x = 8,316,835,741.65
  5. Step 5: Solve for x
    x = 8,316,835,741.65/105,090.37
  6. Step 6: Final answer
    x = 79,139.85

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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.