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Finding the Fourth Proportional to 8,045,985.90, 12,068,978.85 and 7,989,998.70

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Solution

The fourth proportional to 8,045,985.90, 12,068,978.85 and 7,989,998.70 is: 11,984,998.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,045,985.90 : 12,068,978.85 = 7,989,998.70 : x
  2. Step 2: Convert to fraction form
    8,045,985.90/12,068,978.85 = 7,989,998.70/x
  3. Step 3: Cross multiply
    8,045,985.90x = 12,068,978.85 × 7,989,998.70
  4. Step 4: Simplify right side
    8,045,985.90x = 96,431,125,321,827.50
  5. Step 5: Solve for x
    x = 96,431,125,321,827.50/8,045,985.90
  6. Step 6: Final answer
    x = 11,984,998.05

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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.