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Finding the Fourth Proportional to 213,273.60, 320,020.80 and 87,006.40

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Solution

The fourth proportional to 213,273.60, 320,020.80 and 87,006.40 is: 130,554.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,273.60 : 320,020.80 = 87,006.40 : x
  2. Step 2: Convert to fraction form
    213,273.60/320,020.80 = 87,006.40/x
  3. Step 3: Cross multiply
    213,273.60x = 320,020.80 × 87,006.40
  4. Step 4: Simplify right side
    213,273.60x = 27,843,857,733.12
  5. Step 5: Solve for x
    x = 27,843,857,733.12/213,273.60
  6. Step 6: Final answer
    x = 130,554.64

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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.