Home / 105,455.89-145,529.13-57,709.24

Finding the Fourth Proportional to 105,455.89, 145,529.13 and 57,709.24

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Solution

The fourth proportional to 105,455.89, 145,529.13 and 57,709.24 is: 79,638.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,455.89 : 145,529.13 = 57,709.24 : x
  2. Step 2: Convert to fraction form
    105,455.89/145,529.13 = 57,709.24/x
  3. Step 3: Cross multiply
    105,455.89x = 145,529.13 × 57,709.24
  4. Step 4: Simplify right side
    105,455.89x = 8,398,375,490.16
  5. Step 5: Solve for x
    x = 8,398,375,490.16/105,455.89
  6. Step 6: Final answer
    x = 79,638.75

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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.