Home / 128,848.32-177,731.52-81,062.40

Finding the Fourth Proportional to 128,848.32, 177,731.52 and 81,062.40

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Solution

The fourth proportional to 128,848.32, 177,731.52 and 81,062.40 is: 111,816.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,848.32 : 177,731.52 = 81,062.40 : x
  2. Step 2: Convert to fraction form
    128,848.32/177,731.52 = 81,062.40/x
  3. Step 3: Cross multiply
    128,848.32x = 177,731.52 × 81,062.40
  4. Step 4: Simplify right side
    128,848.32x = 14,407,343,566.85
  5. Step 5: Solve for x
    x = 14,407,343,566.85/128,848.32
  6. Step 6: Final answer
    x = 111,816.31

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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.