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Finding the Fourth Proportional to 81,788,428.80, 122,578,444.80 and 43,468,300.80

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Solution

The fourth proportional to 81,788,428.80, 122,578,444.80 and 43,468,300.80 is: 65,147,072.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,788,428.80 : 122,578,444.80 = 43,468,300.80 : x
  2. Step 2: Convert to fraction form
    81,788,428.80/122,578,444.80 = 43,468,300.80/x
  3. Step 3: Cross multiply
    81,788,428.80x = 122,578,444.80 × 43,468,300.80
  4. Step 4: Simplify right side
    81,788,428.80x = 5,328,276,710,162,595
  5. Step 5: Solve for x
    x = 5,328,276,710,162,595/81,788,428.80
  6. Step 6: Final answer
    x = 65,147,072.62

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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.