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Finding the Fourth Proportional to 82,788,270.40, 124,182,405.60 and 81,444,577.60

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Solution

The fourth proportional to 82,788,270.40, 124,182,405.60 and 81,444,577.60 is: 122,166,866.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    82,788,270.40 : 124,182,405.60 = 81,444,577.60 : x
  2. Step 2: Convert to fraction form
    82,788,270.40/124,182,405.60 = 81,444,577.60/x
  3. Step 3: Cross multiply
    82,788,270.40x = 124,182,405.60 × 81,444,577.60
  4. Step 4: Simplify right side
    82,788,270.40x = 10,113,983,569,443,874
  5. Step 5: Solve for x
    x = 10,113,983,569,443,874/82,788,270.40
  6. Step 6: Final answer
    x = 122,166,866.40

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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.