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Finding the Fourth Proportional to 153,221.84, 211,442.08 and 85,235.28

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Solution

The fourth proportional to 153,221.84, 211,442.08 and 85,235.28 is: 117,622.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,221.84 : 211,442.08 = 85,235.28 : x
  2. Step 2: Convert to fraction form
    153,221.84/211,442.08 = 85,235.28/x
  3. Step 3: Cross multiply
    153,221.84x = 211,442.08 × 85,235.28
  4. Step 4: Simplify right side
    153,221.84x = 18,022,324,892.58
  5. Step 5: Solve for x
    x = 18,022,324,892.58/153,221.84
  6. Step 6: Final answer
    x = 117,622.43

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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.