Home / 105,528.99-145,629.33-57,130.56

Finding the Fourth Proportional to 105,528.99, 145,629.33 and 57,130.56

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Solution

The fourth proportional to 105,528.99, 145,629.33 and 57,130.56 is: 78,839.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,528.99 : 145,629.33 = 57,130.56 : x
  2. Step 2: Convert to fraction form
    105,528.99/145,629.33 = 57,130.56/x
  3. Step 3: Cross multiply
    105,528.99x = 145,629.33 × 57,130.56
  4. Step 4: Simplify right side
    105,528.99x = 8,319,885,175.32
  5. Step 5: Solve for x
    x = 8,319,885,175.32/105,528.99
  6. Step 6: Final answer
    x = 78,839.81

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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.