Home / 129,497.13-178,348.64-111,585.60

Finding the Fourth Proportional to 129,497.13, 178,348.64 and 111,585.60

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Solution

The fourth proportional to 129,497.13, 178,348.64 and 111,585.60 is: 153,680.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,497.13 : 178,348.64 = 111,585.60 : x
  2. Step 2: Convert to fraction form
    129,497.13/178,348.64 = 111,585.60/x
  3. Step 3: Cross multiply
    129,497.13x = 178,348.64 × 111,585.60
  4. Step 4: Simplify right side
    129,497.13x = 19,901,139,445.66
  5. Step 5: Solve for x
    x = 19,901,139,445.66/129,497.13
  6. Step 6: Final answer
    x = 153,680.16

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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.