Home / 129,065.40-178,112.52-71,709.98

Finding the Fourth Proportional to 129,065.40, 178,112.52 and 71,709.98

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Solution

The fourth proportional to 129,065.40, 178,112.52 and 71,709.98 is: 98,961.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,065.40 : 178,112.52 = 71,709.98 : x
  2. Step 2: Convert to fraction form
    129,065.40/178,112.52 = 71,709.98/x
  3. Step 3: Cross multiply
    129,065.40x = 178,112.52 × 71,709.98
  4. Step 4: Simplify right side
    129,065.40x = 12,772,444,356.39
  5. Step 5: Solve for x
    x = 12,772,444,356.39/129,065.40
  6. Step 6: Final answer
    x = 98,961.03

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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.