Home / 129,970.08-179,370.78-78,971.07

Finding the Fourth Proportional to 129,970.08, 179,370.78 and 78,971.07

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Solution

The fourth proportional to 129,970.08, 179,370.78 and 78,971.07 is: 108,987.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,970.08 : 179,370.78 = 78,971.07 : x
  2. Step 2: Convert to fraction form
    129,970.08/179,370.78 = 78,971.07/x
  3. Step 3: Cross multiply
    129,970.08x = 179,370.78 × 78,971.07
  4. Step 4: Simplify right side
    129,970.08x = 14,165,102,423.33
  5. Step 5: Solve for x
    x = 14,165,102,423.33/129,970.08
  6. Step 6: Final answer
    x = 108,987.41

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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.