Home / 115,659.20-159,637.56-72,664.40

Finding the Fourth Proportional to 115,659.20, 159,637.56 and 72,664.40

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Solution

The fourth proportional to 115,659.20, 159,637.56 and 72,664.40 is: 100,294.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,659.20 : 159,637.56 = 72,664.40 : x
  2. Step 2: Convert to fraction form
    115,659.20/159,637.56 = 72,664.40/x
  3. Step 3: Cross multiply
    115,659.20x = 159,637.56 × 72,664.40
  4. Step 4: Simplify right side
    115,659.20x = 11,599,967,514.86
  5. Step 5: Solve for x
    x = 11,599,967,514.86/115,659.20
  6. Step 6: Final answer
    x = 100,294.38

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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.