Home / 126,005.12-189,007.68-86,442.32

Finding the Fourth Proportional to 126,005.12, 189,007.68 and 86,442.32

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Solution

The fourth proportional to 126,005.12, 189,007.68 and 86,442.32 is: 129,663.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,005.12 : 189,007.68 = 86,442.32 : x
  2. Step 2: Convert to fraction form
    126,005.12/189,007.68 = 86,442.32/x
  3. Step 3: Cross multiply
    126,005.12x = 189,007.68 × 86,442.32
  4. Step 4: Simplify right side
    126,005.12x = 16,338,262,357.02
  5. Step 5: Solve for x
    x = 16,338,262,357.02/126,005.12
  6. Step 6: Final answer
    x = 129,663.48

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1.5x scale

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.