Home / 81,389,136.80-122,083,705.20-75,153,562.40

Finding the Fourth Proportional to 81,389,136.80, 122,083,705.20 and 75,153,562.40

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Solution

The fourth proportional to 81,389,136.80, 122,083,705.20 and 75,153,562.40 is: 112,730,343.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,389,136.80 : 122,083,705.20 = 75,153,562.40 : x
  2. Step 2: Convert to fraction form
    81,389,136.80/122,083,705.20 = 75,153,562.40/x
  3. Step 3: Cross multiply
    81,389,136.80x = 122,083,705.20 × 75,153,562.40
  4. Step 4: Simplify right side
    81,389,136.80x = 9,175,025,356,771,406
  5. Step 5: Solve for x
    x = 9,175,025,356,771,406/81,389,136.80
  6. Step 6: Final answer
    x = 112,730,343.60

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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.