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Finding the Fourth Proportional to 213,700.60, 320,550.90 and 89,025.40

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Solution

The fourth proportional to 213,700.60, 320,550.90 and 89,025.40 is: 133,538.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,700.60 : 320,550.90 = 89,025.40 : x
  2. Step 2: Convert to fraction form
    213,700.60/320,550.90 = 89,025.40/x
  3. Step 3: Cross multiply
    213,700.60x = 320,550.90 × 89,025.40
  4. Step 4: Simplify right side
    213,700.60x = 28,537,172,092.86
  5. Step 5: Solve for x
    x = 28,537,172,092.86/213,700.60
  6. Step 6: Final answer
    x = 133,538.10

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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.