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Finding the Fourth Proportional to 85,305.65, 127,985.12 and 25,334.46

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Solution

The fourth proportional to 85,305.65, 127,985.12 and 25,334.46 is: 38,009.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,305.65 : 127,985.12 = 25,334.46 : x
  2. Step 2: Convert to fraction form
    85,305.65/127,985.12 = 25,334.46/x
  3. Step 3: Cross multiply
    85,305.65x = 127,985.12 × 25,334.46
  4. Step 4: Simplify right side
    85,305.65x = 3,242,433,776.56
  5. Step 5: Solve for x
    x = 3,242,433,776.56/85,305.65
  6. Step 6: Final answer
    x = 38,009.60

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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.