Home / 128,600.48-177,463.77-72,009.02

Finding the Fourth Proportional to 128,600.48, 177,463.77 and 72,009.02

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Solution

The fourth proportional to 128,600.48, 177,463.77 and 72,009.02 is: 99,369.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,600.48 : 177,463.77 = 72,009.02 : x
  2. Step 2: Convert to fraction form
    128,600.48/177,463.77 = 72,009.02/x
  3. Step 3: Cross multiply
    128,600.48x = 177,463.77 × 72,009.02
  4. Step 4: Simplify right side
    128,600.48x = 12,778,992,163.21
  5. Step 5: Solve for x
    x = 12,778,992,163.21/128,600.48
  6. Step 6: Final answer
    x = 99,369.71

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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.