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Finding the Fourth Proportional to 123,662,707.80, 185,494,061.70 and 80,615,986.80

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Solution

The fourth proportional to 123,662,707.80, 185,494,061.70 and 80,615,986.80 is: 120,923,980.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,662,707.80 : 185,494,061.70 = 80,615,986.80 : x
  2. Step 2: Convert to fraction form
    123,662,707.80/185,494,061.70 = 80,615,986.80/x
  3. Step 3: Cross multiply
    123,662,707.80x = 185,494,061.70 × 80,615,986.80
  4. Step 4: Simplify right side
    123,662,707.80x = 14,953,786,829,485,584
  5. Step 5: Solve for x
    x = 14,953,786,829,485,584/123,662,707.80
  6. Step 6: Final answer
    x = 120,923,980.20

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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.