Home / 81,430,099.10-112,336,086.30-72,147,137.30

Finding the Fourth Proportional to 81,430,099.10, 112,336,086.30 and 72,147,137.30

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Solution

The fourth proportional to 81,430,099.10, 112,336,086.30 and 72,147,137.30 is: 99,529,868.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430,099.10 : 112,336,086.30 = 72,147,137.30 : x
  2. Step 2: Convert to fraction form
    81,430,099.10/112,336,086.30 = 72,147,137.30/x
  3. Step 3: Cross multiply
    81,430,099.10x = 112,336,086.30 × 72,147,137.30
  4. Step 4: Simplify right side
    81,430,099.10x = 8,104,727,042,030,748
  5. Step 5: Solve for x
    x = 8,104,727,042,030,748/81,430,099.10
  6. Step 6: Final answer
    x = 99,529,868.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.