Home / 128,029.20-176,662.64-71,429.60

Finding the Fourth Proportional to 128,029.20, 176,662.64 and 71,429.60

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Solution

The fourth proportional to 128,029.20, 176,662.64 and 71,429.60 is: 98,563.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,029.20 : 176,662.64 = 71,429.60 : x
  2. Step 2: Convert to fraction form
    128,029.20/176,662.64 = 71,429.60/x
  3. Step 3: Cross multiply
    128,029.20x = 176,662.64 × 71,429.60
  4. Step 4: Simplify right side
    128,029.20x = 12,618,941,710.14
  5. Step 5: Solve for x
    x = 12,618,941,710.14/128,029.20
  6. Step 6: Final answer
    x = 98,563.00

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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.