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Finding the Fourth Proportional to 135,370, 186,784.68 and 87,616.72

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Solution

The fourth proportional to 135,370, 186,784.68 and 87,616.72 is: 120,894.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,370 : 186,784.68 = 87,616.72 : x
  2. Step 2: Convert to fraction form
    135,370/186,784.68 = 87,616.72/x
  3. Step 3: Cross multiply
    135,370x = 186,784.68 × 87,616.72
  4. Step 4: Simplify right side
    135,370x = 16,365,461,007.85
  5. Step 5: Solve for x
    x = 16,365,461,007.85/135,370
  6. Step 6: Final answer
    x = 120,894.30

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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.