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Finding the Fourth Proportional to 118,593,339.46, 177,658,330.47 and 81,698,719.30

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Solution

The fourth proportional to 118,593,339.46, 177,658,330.47 and 81,698,719.30 is: 122,388,475.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,593,339.46 : 177,658,330.47 = 81,698,719.30 : x
  2. Step 2: Convert to fraction form
    118,593,339.46/177,658,330.47 = 81,698,719.30/x
  3. Step 3: Cross multiply
    118,593,339.46x = 177,658,330.47 × 81,698,719.30
  4. Step 4: Simplify right side
    118,593,339.46x = 14,514,458,072,375,166
  5. Step 5: Solve for x
    x = 14,514,458,072,375,166/118,593,339.46
  6. Step 6: Final answer
    x = 122,388,475.93

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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.