Home / 281,269.40-388,136.75-153,920.39

Finding the Fourth Proportional to 281,269.40, 388,136.75 and 153,920.39

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Solution

The fourth proportional to 281,269.40, 388,136.75 and 153,920.39 is: 212,401.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,269.40 : 388,136.75 = 153,920.39 : x
  2. Step 2: Convert to fraction form
    281,269.40/388,136.75 = 153,920.39/x
  3. Step 3: Cross multiply
    281,269.40x = 388,136.75 × 153,920.39
  4. Step 4: Simplify right side
    281,269.40x = 59,742,157,223.05
  5. Step 5: Solve for x
    x = 59,742,157,223.05/281,269.40
  6. Step 6: Final answer
    x = 212,401.91

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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.