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Finding the Fourth Proportional to 128,402.44, 177,265.02 and 77,424.28

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Solution

The fourth proportional to 128,402.44, 177,265.02 and 77,424.28 is: 106,887.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,402.44 : 177,265.02 = 77,424.28 : x
  2. Step 2: Convert to fraction form
    128,402.44/177,265.02 = 77,424.28/x
  3. Step 3: Cross multiply
    128,402.44x = 177,265.02 × 77,424.28
  4. Step 4: Simplify right side
    128,402.44x = 13,724,616,542.69
  5. Step 5: Solve for x
    x = 13,724,616,542.69/128,402.44
  6. Step 6: Final answer
    x = 106,887.51

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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.