Home / 158,721.54-219,038.40-87,108.22

Finding the Fourth Proportional to 158,721.54, 219,038.40 and 87,108.22

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Solution

The fourth proportional to 158,721.54, 219,038.40 and 87,108.22 is: 120,210.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,721.54 : 219,038.40 = 87,108.22 : x
  2. Step 2: Convert to fraction form
    158,721.54/219,038.40 = 87,108.22/x
  3. Step 3: Cross multiply
    158,721.54x = 219,038.40 × 87,108.22
  4. Step 4: Simplify right side
    158,721.54x = 19,080,045,135.65
  5. Step 5: Solve for x
    x = 19,080,045,135.65/158,721.54
  6. Step 6: Final answer
    x = 120,210.81

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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.