Home / 139,959,321.60-209,938,982.40-79,493,145.60

Finding the Fourth Proportional to 139,959,321.60, 209,938,982.40 and 79,493,145.60

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Solution

The fourth proportional to 139,959,321.60, 209,938,982.40 and 79,493,145.60 is: 119,239,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,959,321.60 : 209,938,982.40 = 79,493,145.60 : x
  2. Step 2: Convert to fraction form
    139,959,321.60/209,938,982.40 = 79,493,145.60/x
  3. Step 3: Cross multiply
    139,959,321.60x = 209,938,982.40 × 79,493,145.60
  4. Step 4: Simplify right side
    139,959,321.60x = 16,688,710,095,039,036
  5. Step 5: Solve for x
    x = 16,688,710,095,039,036/139,959,321.60
  6. Step 6: Final answer
    x = 119,239,718.40

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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.