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Finding the Fourth Proportional to 65,360,007.20, 98,040,010.80 and 19,921,728.80

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Solution

The fourth proportional to 65,360,007.20, 98,040,010.80 and 19,921,728.80 is: 29,882,593.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,360,007.20 : 98,040,010.80 = 19,921,728.80 : x
  2. Step 2: Convert to fraction form
    65,360,007.20/98,040,010.80 = 19,921,728.80/x
  3. Step 3: Cross multiply
    65,360,007.20x = 98,040,010.80 × 19,921,728.80
  4. Step 4: Simplify right side
    65,360,007.20x = 1,953,126,506,706,671
  5. Step 5: Solve for x
    x = 1,953,126,506,706,671/65,360,007.20
  6. Step 6: Final answer
    x = 29,882,593.20

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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.