Home / 128,138.76-176,833.40-74,423.81

Finding the Fourth Proportional to 128,138.76, 176,833.40 and 74,423.81

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Solution

The fourth proportional to 128,138.76, 176,833.40 and 74,423.81 is: 102,705.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,138.76 : 176,833.40 = 74,423.81 : x
  2. Step 2: Convert to fraction form
    128,138.76/176,833.40 = 74,423.81/x
  3. Step 3: Cross multiply
    128,138.76x = 176,833.40 × 74,423.81
  4. Step 4: Simplify right side
    128,138.76x = 13,160,615,433.22
  5. Step 5: Solve for x
    x = 13,160,615,433.22/128,138.76
  6. Step 6: Final answer
    x = 102,705.97

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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.