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Finding the Fourth Proportional to 153,957.63, 212,449.41 and 85,969.29

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Solution

The fourth proportional to 153,957.63, 212,449.41 and 85,969.29 is: 118,630.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,957.63 : 212,449.41 = 85,969.29 : x
  2. Step 2: Convert to fraction form
    153,957.63/212,449.41 = 85,969.29/x
  3. Step 3: Cross multiply
    153,957.63x = 212,449.41 × 85,969.29
  4. Step 4: Simplify right side
    153,957.63x = 18,264,124,938.62
  5. Step 5: Solve for x
    x = 18,264,124,938.62/153,957.63
  6. Step 6: Final answer
    x = 118,630.85

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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.