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Finding the Fourth Proportional to 153,805.55, 212,251.37 and 85,818.42

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Solution

The fourth proportional to 153,805.55, 212,251.37 and 85,818.42 is: 118,429.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,805.55 : 212,251.37 = 85,818.42 : x
  2. Step 2: Convert to fraction form
    153,805.55/212,251.37 = 85,818.42/x
  3. Step 3: Cross multiply
    153,805.55x = 212,251.37 × 85,818.42
  4. Step 4: Simplify right side
    153,805.55x = 18,215,076,787.14
  5. Step 5: Solve for x
    x = 18,215,076,787.14/153,805.55
  6. Step 6: Final answer
    x = 118,429.26

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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.