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Finding the Fourth Proportional to 115,340.68, 159,170.16 and 65,039.68

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Solution

The fourth proportional to 115,340.68, 159,170.16 and 65,039.68 is: 89,754.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,340.68 : 159,170.16 = 65,039.68 : x
  2. Step 2: Convert to fraction form
    115,340.68/159,170.16 = 65,039.68/x
  3. Step 3: Cross multiply
    115,340.68x = 159,170.16 × 65,039.68
  4. Step 4: Simplify right side
    115,340.68x = 10,352,376,271.95
  5. Step 5: Solve for x
    x = 10,352,376,271.95/115,340.68
  6. Step 6: Final answer
    x = 89,754.77

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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.