Home / 128,005.40-176,636.94-71,415.56

Finding the Fourth Proportional to 128,005.40, 176,636.94 and 71,415.56

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Solution

The fourth proportional to 128,005.40, 176,636.94 and 71,415.56 is: 98,547.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,005.40 : 176,636.94 = 71,415.56 : x
  2. Step 2: Convert to fraction form
    128,005.40/176,636.94 = 71,415.56/x
  3. Step 3: Cross multiply
    128,005.40x = 176,636.94 × 71,415.56
  4. Step 4: Simplify right side
    128,005.40x = 12,614,625,103.60
  5. Step 5: Solve for x
    x = 12,614,625,103.60/128,005.40
  6. Step 6: Final answer
    x = 98,547.60

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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.