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Finding the Fourth Proportional to 153,825.75, 212,291.51 and 84,928.72

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Solution

The fourth proportional to 153,825.75, 212,291.51 and 84,928.72 is: 117,208.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,825.75 : 212,291.51 = 84,928.72 : x
  2. Step 2: Convert to fraction form
    153,825.75/212,291.51 = 84,928.72/x
  3. Step 3: Cross multiply
    153,825.75x = 212,291.51 × 84,928.72
  4. Step 4: Simplify right side
    153,825.75x = 18,029,646,211.17
  5. Step 5: Solve for x
    x = 18,029,646,211.17/153,825.75
  6. Step 6: Final answer
    x = 117,208.25

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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.