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Finding the Fourth Proportional to 65,685, 90,645.30 and 35,877

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Solution

The fourth proportional to 65,685, 90,645.30 and 35,877 is: 49,510.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,685 : 90,645.30 = 35,877 : x
  2. Step 2: Convert to fraction form
    65,685/90,645.30 = 35,877/x
  3. Step 3: Cross multiply
    65,685x = 90,645.30 × 35,877
  4. Step 4: Simplify right side
    65,685x = 3,252,081,428.10
  5. Step 5: Solve for x
    x = 3,252,081,428.10/65,685
  6. Step 6: Final answer
    x = 49,510.26

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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.