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Finding the Fourth Proportional to 128,460.52, 177,264.66 and 73,998.28

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Solution

The fourth proportional to 128,460.52, 177,264.66 and 73,998.28 is: 102,111.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,460.52 : 177,264.66 = 73,998.28 : x
  2. Step 2: Convert to fraction form
    128,460.52/177,264.66 = 73,998.28/x
  3. Step 3: Cross multiply
    128,460.52x = 177,264.66 × 73,998.28
  4. Step 4: Simplify right side
    128,460.52x = 13,117,279,944.78
  5. Step 5: Solve for x
    x = 13,117,279,944.78/128,460.52
  6. Step 6: Final answer
    x = 102,111.37

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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.