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Finding the Fourth Proportional to 135,359.60, 186,733.68 and 87,628.40

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Solution

The fourth proportional to 135,359.60, 186,733.68 and 87,628.40 is: 120,886.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,359.60 : 186,733.68 = 87,628.40 : x
  2. Step 2: Convert to fraction form
    135,359.60/186,733.68 = 87,628.40/x
  3. Step 3: Cross multiply
    135,359.60x = 186,733.68 × 87,628.40
  4. Step 4: Simplify right side
    135,359.60x = 16,363,173,604.51
  5. Step 5: Solve for x
    x = 16,363,173,604.51/135,359.60
  6. Step 6: Final answer
    x = 120,886.69

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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.