Home / 112,665.80-155,478.79-61,678.37

Finding the Fourth Proportional to 112,665.80, 155,478.79 and 61,678.37

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Solution

The fourth proportional to 112,665.80, 155,478.79 and 61,678.37 is: 85,116.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,665.80 : 155,478.79 = 61,678.37 : x
  2. Step 2: Convert to fraction form
    112,665.80/155,478.79 = 61,678.37/x
  3. Step 3: Cross multiply
    112,665.80x = 155,478.79 × 61,678.37
  4. Step 4: Simplify right side
    112,665.80x = 9,589,678,365.28
  5. Step 5: Solve for x
    x = 9,589,678,365.28/112,665.80
  6. Step 6: Final answer
    x = 85,116.14

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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.