Home / 155,779.30-214,976.80-87,783.24

Finding the Fourth Proportional to 155,779.30, 214,976.80 and 87,783.24

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Solution

The fourth proportional to 155,779.30, 214,976.80 and 87,783.24 is: 121,141.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,779.30 : 214,976.80 = 87,783.24 : x
  2. Step 2: Convert to fraction form
    155,779.30/214,976.80 = 87,783.24/x
  3. Step 3: Cross multiply
    155,779.30x = 214,976.80 × 87,783.24
  4. Step 4: Simplify right side
    155,779.30x = 18,871,360,028.83
  5. Step 5: Solve for x
    x = 18,871,360,028.83/155,779.30
  6. Step 6: Final answer
    x = 121,141.64

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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.