Home / 128,004.74-176,647.05-71,418.50

Finding the Fourth Proportional to 128,004.74, 176,647.05 and 71,418.50

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Solution

The fourth proportional to 128,004.74, 176,647.05 and 71,418.50 is: 98,557.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,004.74 : 176,647.05 = 71,418.50 : x
  2. Step 2: Convert to fraction form
    128,004.74/176,647.05 = 71,418.50/x
  3. Step 3: Cross multiply
    128,004.74x = 176,647.05 × 71,418.50
  4. Step 4: Simplify right side
    128,004.74x = 12,615,867,340.43
  5. Step 5: Solve for x
    x = 12,615,867,340.43/128,004.74
  6. Step 6: Final answer
    x = 98,557.81

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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.