Home / 128,302.40-177,052.56-71,714.72

Finding the Fourth Proportional to 128,302.40, 177,052.56 and 71,714.72

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Solution

The fourth proportional to 128,302.40, 177,052.56 and 71,714.72 is: 98,963.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,302.40 : 177,052.56 = 71,714.72 : x
  2. Step 2: Convert to fraction form
    128,302.40/177,052.56 = 71,714.72/x
  3. Step 3: Cross multiply
    128,302.40x = 177,052.56 × 71,714.72
  4. Step 4: Simplify right side
    128,302.40x = 12,697,274,765.68
  5. Step 5: Solve for x
    x = 12,697,274,765.68/128,302.40
  6. Step 6: Final answer
    x = 98,963.66

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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.