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Finding the Fourth Proportional to 101,236.72, 152,011.14 and 85,646.60

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Solution

The fourth proportional to 101,236.72, 152,011.14 and 85,646.60 is: 128,601.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,236.72 : 152,011.14 = 85,646.60 : x
  2. Step 2: Convert to fraction form
    101,236.72/152,011.14 = 85,646.60/x
  3. Step 3: Cross multiply
    101,236.72x = 152,011.14 × 85,646.60
  4. Step 4: Simplify right side
    101,236.72x = 13,019,236,605.29
  5. Step 5: Solve for x
    x = 13,019,236,605.29/101,236.72
  6. Step 6: Final answer
    x = 128,601.92

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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.