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Finding the Fourth Proportional to 96,793,985.70, 145,190,978.55 and 86,212,404.90

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Solution

The fourth proportional to 96,793,985.70, 145,190,978.55 and 86,212,404.90 is: 129,318,607.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    96,793,985.70 : 145,190,978.55 = 86,212,404.90 : x
  2. Step 2: Convert to fraction form
    96,793,985.70/145,190,978.55 = 86,212,404.90/x
  3. Step 3: Cross multiply
    96,793,985.70x = 145,190,978.55 × 86,212,404.90
  4. Step 4: Simplify right side
    96,793,985.70x = 12,517,263,430,579,816
  5. Step 5: Solve for x
    x = 12,517,263,430,579,816/96,793,985.70
  6. Step 6: Final answer
    x = 129,318,607.35

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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.