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Finding the Fourth Proportional to 118,411.36, 163,410.03 and 64,699.70

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Solution

The fourth proportional to 118,411.36, 163,410.03 and 64,699.70 is: 89,286.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,411.36 : 163,410.03 = 64,699.70 : x
  2. Step 2: Convert to fraction form
    118,411.36/163,410.03 = 64,699.70/x
  3. Step 3: Cross multiply
    118,411.36x = 163,410.03 × 64,699.70
  4. Step 4: Simplify right side
    118,411.36x = 10,572,579,100.94
  5. Step 5: Solve for x
    x = 10,572,579,100.94/118,411.36
  6. Step 6: Final answer
    x = 89,286.87

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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.