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Finding the Fourth Proportional to 85,498.94, 128,248.45 and 22,318.89

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Solution

The fourth proportional to 85,498.94, 128,248.45 and 22,318.89 is: 33,478.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,498.94 : 128,248.45 = 22,318.89 : x
  2. Step 2: Convert to fraction form
    85,498.94/128,248.45 = 22,318.89/x
  3. Step 3: Cross multiply
    85,498.94x = 128,248.45 × 22,318.89
  4. Step 4: Simplify right side
    85,498.94x = 2,862,362,992.42
  5. Step 5: Solve for x
    x = 2,862,362,992.42/85,498.94
  6. Step 6: Final answer
    x = 33,478.34

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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.