Home / 129,431.06-178,669.98-87,014.20

Finding the Fourth Proportional to 129,431.06, 178,669.98 and 87,014.20

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Solution

The fourth proportional to 129,431.06, 178,669.98 and 87,014.20 is: 120,116.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,431.06 : 178,669.98 = 87,014.20 : x
  2. Step 2: Convert to fraction form
    129,431.06/178,669.98 = 87,014.20/x
  3. Step 3: Cross multiply
    129,431.06x = 178,669.98 × 87,014.20
  4. Step 4: Simplify right side
    129,431.06x = 15,546,824,045.30
  5. Step 5: Solve for x
    x = 15,546,824,045.30/129,431.06
  6. Step 6: Final answer
    x = 120,116.64

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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.