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Finding the Fourth Proportional to 85,502.80, 128,261.48 and 22,331.32

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Solution

The fourth proportional to 85,502.80, 128,261.48 and 22,331.32 is: 33,498.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,502.80 : 128,261.48 = 22,331.32 : x
  2. Step 2: Convert to fraction form
    85,502.80/128,261.48 = 22,331.32/x
  3. Step 3: Cross multiply
    85,502.80x = 128,261.48 × 22,331.32
  4. Step 4: Simplify right side
    85,502.80x = 2,864,248,153.55
  5. Step 5: Solve for x
    x = 2,864,248,153.55/85,502.80
  6. Step 6: Final answer
    x = 33,498.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.