Home / 111,322.30-166,721-86,160.86

Finding the Fourth Proportional to 111,322.30, 166,721 and 86,160.86

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Solution

The fourth proportional to 111,322.30, 166,721 and 86,160.86 is: 129,038.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,322.30 : 166,721 = 86,160.86 : x
  2. Step 2: Convert to fraction form
    111,322.30/166,721 = 86,160.86/x
  3. Step 3: Cross multiply
    111,322.30x = 166,721 × 86,160.86
  4. Step 4: Simplify right side
    111,322.30x = 14,364,824,740.06
  5. Step 5: Solve for x
    x = 14,364,824,740.06/111,322.30
  6. Step 6: Final answer
    x = 129,038.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.