Home / 128,271.36-177,013.80-71,682.24

Finding the Fourth Proportional to 128,271.36, 177,013.80 and 71,682.24

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Solution

The fourth proportional to 128,271.36, 177,013.80 and 71,682.24 is: 98,921.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,271.36 : 177,013.80 = 71,682.24 : x
  2. Step 2: Convert to fraction form
    128,271.36/177,013.80 = 71,682.24/x
  3. Step 3: Cross multiply
    128,271.36x = 177,013.80 × 71,682.24
  4. Step 4: Simplify right side
    128,271.36x = 12,688,745,694.91
  5. Step 5: Solve for x
    x = 12,688,745,694.91/128,271.36
  6. Step 6: Final answer
    x = 98,921.11

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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.