Home / 113,239.84-169,915.12-80,172.40

Finding the Fourth Proportional to 113,239.84, 169,915.12 and 80,172.40

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Solution

The fourth proportional to 113,239.84, 169,915.12 and 80,172.40 is: 120,297.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    113,239.84 : 169,915.12 = 80,172.40 : x
  2. Step 2: Convert to fraction form
    113,239.84/169,915.12 = 80,172.40/x
  3. Step 3: Cross multiply
    113,239.84x = 169,915.12 × 80,172.40
  4. Step 4: Simplify right side
    113,239.84x = 13,622,502,966.69
  5. Step 5: Solve for x
    x = 13,622,502,966.69/113,239.84
  6. Step 6: Final answer
    x = 120,297.79

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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.