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Finding the Fourth Proportional to 135,412.34, 186,768.32 and 87,628.82

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Solution

The fourth proportional to 135,412.34, 186,768.32 and 87,628.82 is: 120,862.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,412.34 : 186,768.32 = 87,628.82 : x
  2. Step 2: Convert to fraction form
    135,412.34/186,768.32 = 87,628.82/x
  3. Step 3: Cross multiply
    135,412.34x = 186,768.32 × 87,628.82
  4. Step 4: Simplify right side
    135,412.34x = 16,366,287,494.98
  5. Step 5: Solve for x
    x = 16,366,287,494.98/135,412.34
  6. Step 6: Final answer
    x = 120,862.60

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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.