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Finding the Fourth Proportional to 219,592,109.60, 329,164,215.60 and 128,668,896.80

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Solution

The fourth proportional to 219,592,109.60, 329,164,215.60 and 128,668,896.80 is: 192,872,123.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,592,109.60 : 329,164,215.60 = 128,668,896.80 : x
  2. Step 2: Convert to fraction form
    219,592,109.60/329,164,215.60 = 128,668,896.80/x
  3. Step 3: Cross multiply
    219,592,109.60x = 329,164,215.60 × 128,668,896.80
  4. Step 4: Simplify right side
    219,592,109.60x = 42,353,196,487,289,352
  5. Step 5: Solve for x
    x = 42,353,196,487,289,352/219,592,109.60
  6. Step 6: Final answer
    x = 192,872,123.52

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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.