Home / 81,787.04-122,666.28-21,816.26

Finding the Fourth Proportional to 81,787.04, 122,666.28 and 21,816.26

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Solution

The fourth proportional to 81,787.04, 122,666.28 and 21,816.26 is: 32,720.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,787.04 : 122,666.28 = 21,816.26 : x
  2. Step 2: Convert to fraction form
    81,787.04/122,666.28 = 21,816.26/x
  3. Step 3: Cross multiply
    81,787.04x = 122,666.28 × 21,816.26
  4. Step 4: Simplify right side
    81,787.04x = 2,676,119,457.71
  5. Step 5: Solve for x
    x = 2,676,119,457.71/81,787.04
  6. Step 6: Final answer
    x = 32,720.58

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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.