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Finding the Fourth Proportional to 118,634.49, 163,715.61 and 64,919.51

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Solution

The fourth proportional to 118,634.49, 163,715.61 and 64,919.51 is: 89,588.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,634.49 : 163,715.61 = 64,919.51 : x
  2. Step 2: Convert to fraction form
    118,634.49/163,715.61 = 64,919.51/x
  3. Step 3: Cross multiply
    118,634.49x = 163,715.61 × 64,919.51
  4. Step 4: Simplify right side
    118,634.49x = 10,628,337,679.80
  5. Step 5: Solve for x
    x = 10,628,337,679.80/118,634.49
  6. Step 6: Final answer
    x = 89,588.93

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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.