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Finding the Fourth Proportional to 153,825.88, 212,279.76 and 84,915.39

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Solution

The fourth proportional to 153,825.88, 212,279.76 and 84,915.39 is: 117,183.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,825.88 : 212,279.76 = 84,915.39 : x
  2. Step 2: Convert to fraction form
    153,825.88/212,279.76 = 84,915.39/x
  3. Step 3: Cross multiply
    153,825.88x = 212,279.76 × 84,915.39
  4. Step 4: Simplify right side
    153,825.88x = 18,025,818,609.51
  5. Step 5: Solve for x
    x = 18,025,818,609.51/153,825.88
  6. Step 6: Final answer
    x = 117,183.26

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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.