Home / 111,050.96-153,153.44-78,721.62

Finding the Fourth Proportional to 111,050.96, 153,153.44 and 78,721.62

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Solution

The fourth proportional to 111,050.96, 153,153.44 and 78,721.62 is: 108,567.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,050.96 : 153,153.44 = 78,721.62 : x
  2. Step 2: Convert to fraction form
    111,050.96/153,153.44 = 78,721.62/x
  3. Step 3: Cross multiply
    111,050.96x = 153,153.44 × 78,721.62
  4. Step 4: Simplify right side
    111,050.96x = 12,056,486,905.37
  5. Step 5: Solve for x
    x = 12,056,486,905.37/111,050.96
  6. Step 6: Final answer
    x = 108,567.16

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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.