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Finding the Fourth Proportional to 86,798,709.86, 119,782,060.54 and 49,629,688.11

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Solution

The fourth proportional to 86,798,709.86, 119,782,060.54 and 49,629,688.11 is: 68,488,878.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,798,709.86 : 119,782,060.54 = 49,629,688.11 : x
  2. Step 2: Convert to fraction form
    86,798,709.86/119,782,060.54 = 49,629,688.11/x
  3. Step 3: Cross multiply
    86,798,709.86x = 119,782,060.54 × 49,629,688.11
  4. Step 4: Simplify right side
    86,798,709.86x = 5,944,746,305,649,264
  5. Step 5: Solve for x
    x = 5,944,746,305,649,264/86,798,709.86
  6. Step 6: Final answer
    x = 68,488,878.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.