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Finding the Fourth Proportional to 206,475.70, 309,895.80 and 122,130.40

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Solution

The fourth proportional to 206,475.70, 309,895.80 and 122,130.40 is: 183,303.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    206,475.70 : 309,895.80 = 122,130.40 : x
  2. Step 2: Convert to fraction form
    206,475.70/309,895.80 = 122,130.40/x
  3. Step 3: Cross multiply
    206,475.70x = 309,895.80 × 122,130.40
  4. Step 4: Simplify right side
    206,475.70x = 37,847,698,012.32
  5. Step 5: Solve for x
    x = 37,847,698,012.32/206,475.70
  6. Step 6: Final answer
    x = 183,303.40

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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.