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Finding the Fourth Proportional to 215,782.54, 297,814.99 and 129,828.40

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Solution

The fourth proportional to 215,782.54, 297,814.99 and 129,828.40 is: 179,184.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,782.54 : 297,814.99 = 129,828.40 : x
  2. Step 2: Convert to fraction form
    215,782.54/297,814.99 = 129,828.40/x
  3. Step 3: Cross multiply
    215,782.54x = 297,814.99 × 129,828.40
  4. Step 4: Simplify right side
    215,782.54x = 38,664,843,647.72
  5. Step 5: Solve for x
    x = 38,664,843,647.72/215,782.54
  6. Step 6: Final answer
    x = 179,184.30

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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.