Home / 128,117.82-176,789.19-74,392.35

Finding the Fourth Proportional to 128,117.82, 176,789.19 and 74,392.35

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Solution

The fourth proportional to 128,117.82, 176,789.19 and 74,392.35 is: 102,653.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,117.82 : 176,789.19 = 74,392.35 : x
  2. Step 2: Convert to fraction form
    128,117.82/176,789.19 = 74,392.35/x
  3. Step 3: Cross multiply
    128,117.82x = 176,789.19 × 74,392.35
  4. Step 4: Simplify right side
    128,117.82x = 13,151,763,298.70
  5. Step 5: Solve for x
    x = 13,151,763,298.70/128,117.82
  6. Step 6: Final answer
    x = 102,653.66

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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.