Home / 128,733.75-177,663.51-72,156.06

Finding the Fourth Proportional to 128,733.75, 177,663.51 and 72,156.06

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Solution

The fourth proportional to 128,733.75, 177,663.51 and 72,156.06 is: 99,581.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,733.75 : 177,663.51 = 72,156.06 : x
  2. Step 2: Convert to fraction form
    128,733.75/177,663.51 = 72,156.06/x
  3. Step 3: Cross multiply
    128,733.75x = 177,663.51 × 72,156.06
  4. Step 4: Simplify right side
    128,733.75x = 12,819,498,887.37
  5. Step 5: Solve for x
    x = 12,819,498,887.37/128,733.75
  6. Step 6: Final answer
    x = 99,581.49

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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.