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Finding the Fourth Proportional to 213,999.80, 321,038.10 and 89,353.40

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Solution

The fourth proportional to 213,999.80, 321,038.10 and 89,353.40 is: 134,046.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,999.80 : 321,038.10 = 89,353.40 : x
  2. Step 2: Convert to fraction form
    213,999.80/321,038.10 = 89,353.40/x
  3. Step 3: Cross multiply
    213,999.80x = 321,038.10 × 89,353.40
  4. Step 4: Simplify right side
    213,999.80x = 28,685,845,764.54
  5. Step 5: Solve for x
    x = 28,685,845,764.54/213,999.80
  6. Step 6: Final answer
    x = 134,046.13

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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.