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Finding the Fourth Proportional to 219,592,105.60, 329,164,209.60 and 128,668,892.80

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Solution

The fourth proportional to 219,592,105.60, 329,164,209.60 and 128,668,892.80 is: 192,872,117.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,592,105.60 : 329,164,209.60 = 128,668,892.80 : x
  2. Step 2: Convert to fraction form
    219,592,105.60/329,164,209.60 = 128,668,892.80/x
  3. Step 3: Cross multiply
    219,592,105.60x = 329,164,209.60 × 128,668,892.80
  4. Step 4: Simplify right side
    219,592,105.60x = 42,353,194,398,619,136
  5. Step 5: Solve for x
    x = 42,353,194,398,619,136/219,592,105.60
  6. Step 6: Final answer
    x = 192,872,117.52

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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.