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Finding the Fourth Proportional to 79,657,431.20, 119,486,146.80 and 54,998,568.80

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Solution

The fourth proportional to 79,657,431.20, 119,486,146.80 and 54,998,568.80 is: 82,497,853.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,657,431.20 : 119,486,146.80 = 54,998,568.80 : x
  2. Step 2: Convert to fraction form
    79,657,431.20/119,486,146.80 = 54,998,568.80/x
  3. Step 3: Cross multiply
    79,657,431.20x = 119,486,146.80 × 54,998,568.80
  4. Step 4: Simplify right side
    79,657,431.20x = 6,571,567,065,426,699
  5. Step 5: Solve for x
    x = 6,571,567,065,426,699/79,657,431.20
  6. Step 6: Final answer
    x = 82,497,853.20

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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.