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Finding the Fourth Proportional to 63,690, 87,892.32 and 35,402.40

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Solution

The fourth proportional to 63,690, 87,892.32 and 35,402.40 is: 48,855.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    63,690 : 87,892.32 = 35,402.40 : x
  2. Step 2: Convert to fraction form
    63,690/87,892.32 = 35,402.40/x
  3. Step 3: Cross multiply
    63,690x = 87,892.32 × 35,402.40
  4. Step 4: Simplify right side
    63,690x = 3,111,599,069.57
  5. Step 5: Solve for x
    x = 3,111,599,069.57/63,690
  6. Step 6: Final answer
    x = 48,855.38

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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.