Home / 128,612.83-177,471.07-74,886.52

Finding the Fourth Proportional to 128,612.83, 177,471.07 and 74,886.52

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Solution

The fourth proportional to 128,612.83, 177,471.07 and 74,886.52 is: 103,334.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,612.83 : 177,471.07 = 74,886.52 : x
  2. Step 2: Convert to fraction form
    128,612.83/177,471.07 = 74,886.52/x
  3. Step 3: Cross multiply
    128,612.83x = 177,471.07 × 74,886.52
  4. Step 4: Simplify right side
    128,612.83x = 13,290,190,832.98
  5. Step 5: Solve for x
    x = 13,290,190,832.98/128,612.83
  6. Step 6: Final answer
    x = 103,334.88

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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.