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Finding the Fourth Proportional to 155,412.84, 214,469.40 and 87,429.84

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Solution

The fourth proportional to 155,412.84, 214,469.40 and 87,429.84 is: 120,653.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,412.84 : 214,469.40 = 87,429.84 : x
  2. Step 2: Convert to fraction form
    155,412.84/214,469.40 = 87,429.84/x
  3. Step 3: Cross multiply
    155,412.84x = 214,469.40 × 87,429.84
  4. Step 4: Simplify right side
    155,412.84x = 18,751,025,326.90
  5. Step 5: Solve for x
    x = 18,751,025,326.90/155,412.84
  6. Step 6: Final answer
    x = 120,653.00

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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.