Home / 128,429.20-177,154.80-84,822.02

Finding the Fourth Proportional to 128,429.20, 177,154.80 and 84,822.02

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Solution

The fourth proportional to 128,429.20, 177,154.80 and 84,822.02 is: 117,003.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,429.20 : 177,154.80 = 84,822.02 : x
  2. Step 2: Convert to fraction form
    128,429.20/177,154.80 = 84,822.02/x
  3. Step 3: Cross multiply
    128,429.20x = 177,154.80 × 84,822.02
  4. Step 4: Simplify right side
    128,429.20x = 15,026,627,988.70
  5. Step 5: Solve for x
    x = 15,026,627,988.70/128,429.20
  6. Step 6: Final answer
    x = 117,003.20

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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.