Home / 98,678.16-136,216.36-66,890.64

Finding the Fourth Proportional to 98,678.16, 136,216.36 and 66,890.64

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Solution

The fourth proportional to 98,678.16, 136,216.36 and 66,890.64 is: 92,336.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,678.16 : 136,216.36 = 66,890.64 : x
  2. Step 2: Convert to fraction form
    98,678.16/136,216.36 = 66,890.64/x
  3. Step 3: Cross multiply
    98,678.16x = 136,216.36 × 66,890.64
  4. Step 4: Simplify right side
    98,678.16x = 9,111,599,498.87
  5. Step 5: Solve for x
    x = 9,111,599,498.87/98,678.16
  6. Step 6: Final answer
    x = 92,336.54

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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.