Home / 128,649.09-177,535.77-72,060.47

Finding the Fourth Proportional to 128,649.09, 177,535.77 and 72,060.47

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Solution

The fourth proportional to 128,649.09, 177,535.77 and 72,060.47 is: 99,443.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,649.09 : 177,535.77 = 72,060.47 : x
  2. Step 2: Convert to fraction form
    128,649.09/177,535.77 = 72,060.47/x
  3. Step 3: Cross multiply
    128,649.09x = 177,535.77 × 72,060.47
  4. Step 4: Simplify right side
    128,649.09x = 12,793,310,535.87
  5. Step 5: Solve for x
    x = 12,793,310,535.87/128,649.09
  6. Step 6: Final answer
    x = 99,443.46

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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.