Home / 128,826.48-177,775.20-77,869.08

Finding the Fourth Proportional to 128,826.48, 177,775.20 and 77,869.08

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Solution

The fourth proportional to 128,826.48, 177,775.20 and 77,869.08 is: 107,456.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,826.48 : 177,775.20 = 77,869.08 : x
  2. Step 2: Convert to fraction form
    128,826.48/177,775.20 = 77,869.08/x
  3. Step 3: Cross multiply
    128,826.48x = 177,775.20 × 77,869.08
  4. Step 4: Simplify right side
    128,826.48x = 13,843,191,270.82
  5. Step 5: Solve for x
    x = 13,843,191,270.82/128,826.48
  6. Step 6: Final answer
    x = 107,456.10

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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.