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Finding the Fourth Proportional to 76,991,999.40, 115,487,999.10 and 23,139,311.40

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Solution

The fourth proportional to 76,991,999.40, 115,487,999.10 and 23,139,311.40 is: 34,708,967.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,991,999.40 : 115,487,999.10 = 23,139,311.40 : x
  2. Step 2: Convert to fraction form
    76,991,999.40/115,487,999.10 = 23,139,311.40/x
  3. Step 3: Cross multiply
    76,991,999.40x = 115,487,999.10 × 23,139,311.40
  4. Step 4: Simplify right side
    76,991,999.40x = 2,672,312,774,137,819.50
  5. Step 5: Solve for x
    x = 2,672,312,774,137,819.50/76,991,999.40
  6. Step 6: Final answer
    x = 34,708,967.10

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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.