Home / 129,430.06-178,668.60-87,013.20

Finding the Fourth Proportional to 129,430.06, 178,668.60 and 87,013.20

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Solution

The fourth proportional to 129,430.06, 178,668.60 and 87,013.20 is: 120,115.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,430.06 : 178,668.60 = 87,013.20 : x
  2. Step 2: Convert to fraction form
    129,430.06/178,668.60 = 87,013.20/x
  3. Step 3: Cross multiply
    129,430.06x = 178,668.60 × 87,013.20
  4. Step 4: Simplify right side
    129,430.06x = 15,546,525,297.11
  5. Step 5: Solve for x
    x = 15,546,525,297.11/129,430.06
  6. Step 6: Final answer
    x = 120,115.26

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1.5x scale

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.