Home / 105,128.08-145,076.16-57,381.28

Finding the Fourth Proportional to 105,128.08, 145,076.16 and 57,381.28

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Solution

The fourth proportional to 105,128.08, 145,076.16 and 57,381.28 is: 79,185.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,128.08 : 145,076.16 = 57,381.28 : x
  2. Step 2: Convert to fraction form
    105,128.08/145,076.16 = 57,381.28/x
  3. Step 3: Cross multiply
    105,128.08x = 145,076.16 × 57,381.28
  4. Step 4: Simplify right side
    105,128.08x = 8,324,655,758.28
  5. Step 5: Solve for x
    x = 8,324,655,758.28/105,128.08
  6. Step 6: Final answer
    x = 79,185.84

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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.