Home / 129,326.70-178,369.56-84,019.18

Finding the Fourth Proportional to 129,326.70, 178,369.56 and 84,019.18

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Solution

The fourth proportional to 129,326.70, 178,369.56 and 84,019.18 is: 115,880.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,326.70 : 178,369.56 = 84,019.18 : x
  2. Step 2: Convert to fraction form
    129,326.70/178,369.56 = 84,019.18/x
  3. Step 3: Cross multiply
    129,326.70x = 178,369.56 × 84,019.18
  4. Step 4: Simplify right side
    129,326.70x = 14,986,464,168.16
  5. Step 5: Solve for x
    x = 14,986,464,168.16/129,326.70
  6. Step 6: Final answer
    x = 115,880.67

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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.