Home / 128,117.93-176,789.30-74,392.43

Finding the Fourth Proportional to 128,117.93, 176,789.30 and 74,392.43

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Solution

The fourth proportional to 128,117.93, 176,789.30 and 74,392.43 is: 102,653.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,117.93 : 176,789.30 = 74,392.43 : x
  2. Step 2: Convert to fraction form
    128,117.93/176,789.30 = 74,392.43/x
  3. Step 3: Cross multiply
    128,117.93x = 176,789.30 × 74,392.43
  4. Step 4: Simplify right side
    128,117.93x = 13,151,784,369.09
  5. Step 5: Solve for x
    x = 13,151,784,369.09/128,117.93
  6. Step 6: Final answer
    x = 102,653.74

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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.