Home / 105,129.08-145,077.54-57,382.28

Finding the Fourth Proportional to 105,129.08, 145,077.54 and 57,382.28

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Solution

The fourth proportional to 105,129.08, 145,077.54 and 57,382.28 is: 79,187.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,129.08 : 145,077.54 = 57,382.28 : x
  2. Step 2: Convert to fraction form
    105,129.08/145,077.54 = 57,382.28/x
  3. Step 3: Cross multiply
    105,129.08x = 145,077.54 × 57,382.28
  4. Step 4: Simplify right side
    105,129.08x = 8,324,880,021.99
  5. Step 5: Solve for x
    x = 8,324,880,021.99/105,129.08
  6. Step 6: Final answer
    x = 79,187.22

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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.