Home / 115,141.78-172,491.09-70,638.58

Finding the Fourth Proportional to 115,141.78, 172,491.09 and 70,638.58

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Solution

The fourth proportional to 115,141.78, 172,491.09 and 70,638.58 is: 105,821.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,141.78 : 172,491.09 = 70,638.58 : x
  2. Step 2: Convert to fraction form
    115,141.78/172,491.09 = 70,638.58/x
  3. Step 3: Cross multiply
    115,141.78x = 172,491.09 × 70,638.58
  4. Step 4: Simplify right side
    115,141.78x = 12,184,525,660.25
  5. Step 5: Solve for x
    x = 12,184,525,660.25/115,141.78
  6. Step 6: Final answer
    x = 105,821.93

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.