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Finding the Fourth Proportional to 89,925.84, 134,889.60 and 39,992.40

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Solution

The fourth proportional to 89,925.84, 134,889.60 and 39,992.40 is: 59,988.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,925.84 : 134,889.60 = 39,992.40 : x
  2. Step 2: Convert to fraction form
    89,925.84/134,889.60 = 39,992.40/x
  3. Step 3: Cross multiply
    89,925.84x = 134,889.60 × 39,992.40
  4. Step 4: Simplify right side
    89,925.84x = 5,394,558,839.04
  5. Step 5: Solve for x
    x = 5,394,558,839.04/89,925.84
  6. Step 6: Final answer
    x = 59,988.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.