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Finding the Fourth Proportional to 143,139.40, 214,271.70 and 143,139.40

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Solution

The fourth proportional to 143,139.40, 214,271.70 and 143,139.40 is: 214,271.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,139.40 : 214,271.70 = 143,139.40 : x
  2. Step 2: Convert to fraction form
    143,139.40/214,271.70 = 143,139.40/x
  3. Step 3: Cross multiply
    143,139.40x = 214,271.70 × 143,139.40
  4. Step 4: Simplify right side
    143,139.40x = 30,670,722,574.98
  5. Step 5: Solve for x
    x = 30,670,722,574.98/143,139.40
  6. Step 6: Final answer
    x = 214,271.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.