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Finding the Fourth Proportional to 120,159.33, 165,822.71 and 66,445.39

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Solution

The fourth proportional to 120,159.33, 165,822.71 and 66,445.39 is: 91,696.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,159.33 : 165,822.71 = 66,445.39 : x
  2. Step 2: Convert to fraction form
    120,159.33/165,822.71 = 66,445.39/x
  3. Step 3: Cross multiply
    120,159.33x = 165,822.71 × 66,445.39
  4. Step 4: Simplify right side
    120,159.33x = 11,018,154,636.81
  5. Step 5: Solve for x
    x = 11,018,154,636.81/120,159.33
  6. Step 6: Final answer
    x = 91,696.21

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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.