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Finding the Fourth Proportional to 118,396.51, 163,398.44 and 64,689.59

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Solution

The fourth proportional to 118,396.51, 163,398.44 and 64,689.59 is: 89,277.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,396.51 : 163,398.44 = 64,689.59 : x
  2. Step 2: Convert to fraction form
    118,396.51/163,398.44 = 64,689.59/x
  3. Step 3: Cross multiply
    118,396.51x = 163,398.44 × 64,689.59
  4. Step 4: Simplify right side
    118,396.51x = 10,570,178,090.24
  5. Step 5: Solve for x
    x = 10,570,178,090.24/118,396.51
  6. Step 6: Final answer
    x = 89,277.78

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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.