Home / 115,169.90-159,032.40-72,221.32

Finding the Fourth Proportional to 115,169.90, 159,032.40 and 72,221.32

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Solution

The fourth proportional to 115,169.90, 159,032.40 and 72,221.32 is: 99,726.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,169.90 : 159,032.40 = 72,221.32 : x
  2. Step 2: Convert to fraction form
    115,169.90/159,032.40 = 72,221.32/x
  3. Step 3: Cross multiply
    115,169.90x = 159,032.40 × 72,221.32
  4. Step 4: Simplify right side
    115,169.90x = 11,485,529,808.74
  5. Step 5: Solve for x
    x = 11,485,529,808.74/115,169.90
  6. Step 6: Final answer
    x = 99,726.84

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1.5x scale

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.