Home / 129,115.37-178,178.51-70,973.43

Finding the Fourth Proportional to 129,115.37, 178,178.51 and 70,973.43

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Solution

The fourth proportional to 129,115.37, 178,178.51 and 70,973.43 is: 97,942.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,115.37 : 178,178.51 = 70,973.43 : x
  2. Step 2: Convert to fraction form
    129,115.37/178,178.51 = 70,973.43/x
  3. Step 3: Cross multiply
    129,115.37x = 178,178.51 × 70,973.43
  4. Step 4: Simplify right side
    129,115.37x = 12,645,939,652.12
  5. Step 5: Solve for x
    x = 12,645,939,652.12/129,115.37
  6. Step 6: Final answer
    x = 97,942.95

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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.