Home / 128,747.07-177,635.74-77,043.35

Finding the Fourth Proportional to 128,747.07, 177,635.74 and 77,043.35

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Solution

The fourth proportional to 128,747.07, 177,635.74 and 77,043.35 is: 106,298.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,747.07 : 177,635.74 = 77,043.35 : x
  2. Step 2: Convert to fraction form
    128,747.07/177,635.74 = 77,043.35/x
  3. Step 3: Cross multiply
    128,747.07x = 177,635.74 × 77,043.35
  4. Step 4: Simplify right side
    128,747.07x = 13,685,652,740.81
  5. Step 5: Solve for x
    x = 13,685,652,740.81/128,747.07
  6. Step 6: Final answer
    x = 106,298.75

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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.