Home / 128,658.04-177,556.26-72,077.92

Finding the Fourth Proportional to 128,658.04, 177,556.26 and 72,077.92

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Solution

The fourth proportional to 128,658.04, 177,556.26 and 72,077.92 is: 99,472.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,658.04 : 177,556.26 = 72,077.92 : x
  2. Step 2: Convert to fraction form
    128,658.04/177,556.26 = 72,077.92/x
  3. Step 3: Cross multiply
    128,658.04x = 177,556.26 × 72,077.92
  4. Step 4: Simplify right side
    128,658.04x = 12,797,885,903.78
  5. Step 5: Solve for x
    x = 12,797,885,903.78/128,658.04
  6. Step 6: Final answer
    x = 99,472.10

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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.