Home / 105,128.70-145,078.23-57,381.02

Finding the Fourth Proportional to 105,128.70, 145,078.23 and 57,381.02

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Solution

The fourth proportional to 105,128.70, 145,078.23 and 57,381.02 is: 79,186.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,128.70 : 145,078.23 = 57,381.02 : x
  2. Step 2: Convert to fraction form
    105,128.70/145,078.23 = 57,381.02/x
  3. Step 3: Cross multiply
    105,128.70x = 145,078.23 × 57,381.02
  4. Step 4: Simplify right side
    105,128.70x = 8,324,736,817.19
  5. Step 5: Solve for x
    x = 8,324,736,817.19/105,128.70
  6. Step 6: Final answer
    x = 79,186.15

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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.