Home / 81,430,098.60-112,336,085.61-72,147,136.80

Finding the Fourth Proportional to 81,430,098.60, 112,336,085.61 and 72,147,136.80

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Solution

The fourth proportional to 81,430,098.60, 112,336,085.61 and 72,147,136.80 is: 99,529,867.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,430,098.60 : 112,336,085.61 = 72,147,136.80 : x
  2. Step 2: Convert to fraction form
    81,430,098.60/112,336,085.61 = 72,147,136.80/x
  3. Step 3: Cross multiply
    81,430,098.60x = 112,336,085.61 × 72,147,136.80
  4. Step 4: Simplify right side
    81,430,098.60x = 8,104,726,936,081,181
  5. Step 5: Solve for x
    x = 8,104,726,936,081,181/81,430,098.60
  6. Step 6: Final answer
    x = 99,529,867.65

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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.