Home / 115,918.08-159,966.72-65,621.76

Finding the Fourth Proportional to 115,918.08, 159,966.72 and 65,621.76

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Solution

The fourth proportional to 115,918.08, 159,966.72 and 65,621.76 is: 90,557.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,918.08 : 159,966.72 = 65,621.76 : x
  2. Step 2: Convert to fraction form
    115,918.08/159,966.72 = 65,621.76/x
  3. Step 3: Cross multiply
    115,918.08x = 159,966.72 × 65,621.76
  4. Step 4: Simplify right side
    115,918.08x = 10,497,297,707.83
  5. Step 5: Solve for x
    x = 10,497,297,707.83/115,918.08
  6. Step 6: Final answer
    x = 90,557.90

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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.