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Finding the Fourth Proportional to 128,495.76, 177,342.80 and 74,037.33

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Solution

The fourth proportional to 128,495.76, 177,342.80 and 74,037.33 is: 102,182.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,495.76 : 177,342.80 = 74,037.33 : x
  2. Step 2: Convert to fraction form
    128,495.76/177,342.80 = 74,037.33/x
  3. Step 3: Cross multiply
    128,495.76x = 177,342.80 × 74,037.33
  4. Step 4: Simplify right side
    128,495.76x = 13,129,987,036.54
  5. Step 5: Solve for x
    x = 13,129,987,036.54/128,495.76
  6. Step 6: Final answer
    x = 102,182.26

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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.