Home / 129,289.54-178,418.36-72,701.32

Finding the Fourth Proportional to 129,289.54, 178,418.36 and 72,701.32

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Solution

The fourth proportional to 129,289.54, 178,418.36 and 72,701.32 is: 100,327.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,289.54 : 178,418.36 = 72,701.32 : x
  2. Step 2: Convert to fraction form
    129,289.54/178,418.36 = 72,701.32/x
  3. Step 3: Cross multiply
    129,289.54x = 178,418.36 × 72,701.32
  4. Step 4: Simplify right side
    129,289.54x = 12,971,250,284.24
  5. Step 5: Solve for x
    x = 12,971,250,284.24/129,289.54
  6. Step 6: Final answer
    x = 100,327.14

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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.