Home / 129,324.36-178,465.86-72,735.72

Finding the Fourth Proportional to 129,324.36, 178,465.86 and 72,735.72

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Solution

The fourth proportional to 129,324.36, 178,465.86 and 72,735.72 is: 100,374.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,324.36 : 178,465.86 = 72,735.72 : x
  2. Step 2: Convert to fraction form
    129,324.36/178,465.86 = 72,735.72/x
  3. Step 3: Cross multiply
    129,324.36x = 178,465.86 × 72,735.72
  4. Step 4: Simplify right side
    129,324.36x = 12,980,842,822.52
  5. Step 5: Solve for x
    x = 12,980,842,822.52/129,324.36
  6. Step 6: Final answer
    x = 100,374.31

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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.