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Finding the Fourth Proportional to 115,378.76, 159,216.18 and 65,074.76

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Solution

The fourth proportional to 115,378.76, 159,216.18 and 65,074.76 is: 89,799.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,378.76 : 159,216.18 = 65,074.76 : x
  2. Step 2: Convert to fraction form
    115,378.76/159,216.18 = 65,074.76/x
  3. Step 3: Cross multiply
    115,378.76x = 159,216.18 × 65,074.76
  4. Step 4: Simplify right side
    115,378.76x = 10,360,954,701.62
  5. Step 5: Solve for x
    x = 10,360,954,701.62/115,378.76
  6. Step 6: Final answer
    x = 89,799.50

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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.