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Finding the Fourth Proportional to 153,679.25, 212,081.13 and 85,695.57

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Solution

The fourth proportional to 153,679.25, 212,081.13 and 85,695.57 is: 118,261.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,679.25 : 212,081.13 = 85,695.57 : x
  2. Step 2: Convert to fraction form
    153,679.25/212,081.13 = 85,695.57/x
  3. Step 3: Cross multiply
    153,679.25x = 212,081.13 × 85,695.57
  4. Step 4: Simplify right side
    153,679.25x = 18,174,413,321.59
  5. Step 5: Solve for x
    x = 18,174,413,321.59/153,679.25
  6. Step 6: Final answer
    x = 118,261.98

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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.