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Finding the Fourth Proportional to 219,365.60, 328,829.70 and 100,830.20

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Solution

The fourth proportional to 219,365.60, 328,829.70 and 100,830.20 is: 151,144.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,365.60 : 328,829.70 = 100,830.20 : x
  2. Step 2: Convert to fraction form
    219,365.60/328,829.70 = 100,830.20/x
  3. Step 3: Cross multiply
    219,365.60x = 328,829.70 × 100,830.20
  4. Step 4: Simplify right side
    219,365.60x = 33,155,964,416.94
  5. Step 5: Solve for x
    x = 33,155,964,416.94/219,365.60
  6. Step 6: Final answer
    x = 151,144.78

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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.