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Finding the Fourth Proportional to 218,709,563.60, 328,064,345.40 and 127,786,350.80

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Solution

The fourth proportional to 218,709,563.60, 328,064,345.40 and 127,786,350.80 is: 191,679,526.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,709,563.60 : 328,064,345.40 = 127,786,350.80 : x
  2. Step 2: Convert to fraction form
    218,709,563.60/328,064,345.40 = 127,786,350.80/x
  3. Step 3: Cross multiply
    218,709,563.60x = 328,064,345.40 × 127,786,350.80
  4. Step 4: Simplify right side
    218,709,563.60x = 41,922,145,526,256,760
  5. Step 5: Solve for x
    x = 41,922,145,526,256,760/218,709,563.60
  6. Step 6: Final answer
    x = 191,679,526.20

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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.