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Finding the Fourth Proportional to 51,259,985.40, 76,889,978.10 and 20,957,777.40

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Solution

The fourth proportional to 51,259,985.40, 76,889,978.10 and 20,957,777.40 is: 31,436,666.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,259,985.40 : 76,889,978.10 = 20,957,777.40 : x
  2. Step 2: Convert to fraction form
    51,259,985.40/76,889,978.10 = 20,957,777.40/x
  3. Step 3: Cross multiply
    51,259,985.40x = 76,889,978.10 × 20,957,777.40
  4. Step 4: Simplify right side
    51,259,985.40x = 1,611,443,045,310,674.75
  5. Step 5: Solve for x
    x = 1,611,443,045,310,674.75/51,259,985.40
  6. Step 6: Final answer
    x = 31,436,666.10

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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.