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Finding the Fourth Proportional to 82,978,246.80, 124,215,427.80 and 73,908,320.40

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Solution

The fourth proportional to 82,978,246.80, 124,215,427.80 and 73,908,320.40 is: 110,638,076.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,978,246.80 : 124,215,427.80 = 73,908,320.40 : x
  2. Step 2: Convert to fraction form
    82,978,246.80/124,215,427.80 = 73,908,320.40/x
  3. Step 3: Cross multiply
    82,978,246.80x = 124,215,427.80 × 73,908,320.40
  4. Step 4: Simplify right side
    82,978,246.80x = 9,180,553,636,465,468
  5. Step 5: Solve for x
    x = 9,180,553,636,465,468/82,978,246.80
  6. Step 6: Final answer
    x = 110,638,076.73

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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.