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Finding the Fourth Proportional to 153,679.49, 212,078.37 and 85,696.25

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Solution

The fourth proportional to 153,679.49, 212,078.37 and 85,696.25 is: 118,261.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,679.49 : 212,078.37 = 85,696.25 : x
  2. Step 2: Convert to fraction form
    153,679.49/212,078.37 = 85,696.25/x
  3. Step 3: Cross multiply
    153,679.49x = 212,078.37 × 85,696.25
  4. Step 4: Simplify right side
    153,679.49x = 18,174,319,954.72
  5. Step 5: Solve for x
    x = 18,174,319,954.72/153,679.49
  6. Step 6: Final answer
    x = 118,261.20

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1.5x scale

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.