Home / 115,657.20-159,634.80-72,662.40

Finding the Fourth Proportional to 115,657.20, 159,634.80 and 72,662.40

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Solution

The fourth proportional to 115,657.20, 159,634.80 and 72,662.40 is: 100,291.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,657.20 : 159,634.80 = 72,662.40 : x
  2. Step 2: Convert to fraction form
    115,657.20/159,634.80 = 72,662.40/x
  3. Step 3: Cross multiply
    115,657.20x = 159,634.80 × 72,662.40
  4. Step 4: Simplify right side
    115,657.20x = 11,599,447,691.52
  5. Step 5: Solve for x
    x = 11,599,447,691.52/115,657.20
  6. Step 6: Final answer
    x = 100,291.62

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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.