Home / 85,371,688.89-128,057,105.04-20,675,492.22

Finding the Fourth Proportional to 85,371,688.89, 128,057,105.04 and 20,675,492.22

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Solution

The fourth proportional to 85,371,688.89, 128,057,105.04 and 20,675,492.22 is: 31,013,134.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,371,688.89 : 128,057,105.04 = 20,675,492.22 : x
  2. Step 2: Convert to fraction form
    85,371,688.89/128,057,105.04 = 20,675,492.22/x
  3. Step 3: Cross multiply
    85,371,688.89x = 128,057,105.04 × 20,675,492.22
  4. Step 4: Simplify right side
    85,371,688.89x = 2,647,643,678,970,243
  5. Step 5: Solve for x
    x = 2,647,643,678,970,243/85,371,688.89
  6. Step 6: Final answer
    x = 31,013,134.60

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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.