Home / 112,905.49-155,809.80-61,918.58

Finding the Fourth Proportional to 112,905.49, 155,809.80 and 61,918.58

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Solution

The fourth proportional to 112,905.49, 155,809.80 and 61,918.58 is: 85,447.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,905.49 : 155,809.80 = 61,918.58 : x
  2. Step 2: Convert to fraction form
    112,905.49/155,809.80 = 61,918.58/x
  3. Step 3: Cross multiply
    112,905.49x = 155,809.80 × 61,918.58
  4. Step 4: Simplify right side
    112,905.49x = 9,647,521,139.13
  5. Step 5: Solve for x
    x = 9,647,521,139.13/112,905.49
  6. Step 6: Final answer
    x = 85,447.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.