Home / 218,907,355.80-328,144,457.70-103,689,384.60

Finding the Fourth Proportional to 218,907,355.80, 328,144,457.70 and 103,689,384.60

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Solution

The fourth proportional to 218,907,355.80, 328,144,457.70 and 103,689,384.60 is: 155,431,491.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,907,355.80 : 328,144,457.70 = 103,689,384.60 : x
  2. Step 2: Convert to fraction form
    218,907,355.80/328,144,457.70 = 103,689,384.60/x
  3. Step 3: Cross multiply
    218,907,355.80x = 328,144,457.70 × 103,689,384.60
  4. Step 4: Simplify right side
    218,907,355.80x = 34,025,096,878,813,728
  5. Step 5: Solve for x
    x = 34,025,096,878,813,728/218,907,355.80
  6. Step 6: Final answer
    x = 155,431,491.80

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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.