Home / 128,052.78-176,708.18-70,690.86

Finding the Fourth Proportional to 128,052.78, 176,708.18 and 70,690.86

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Solution

The fourth proportional to 128,052.78, 176,708.18 and 70,690.86 is: 97,550.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,052.78 : 176,708.18 = 70,690.86 : x
  2. Step 2: Convert to fraction form
    128,052.78/176,708.18 = 70,690.86/x
  3. Step 3: Cross multiply
    128,052.78x = 176,708.18 × 70,690.86
  4. Step 4: Simplify right side
    128,052.78x = 12,491,653,213.23
  5. Step 5: Solve for x
    x = 12,491,653,213.23/128,052.78
  6. Step 6: Final answer
    x = 97,550.82

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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.