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Finding the Fourth Proportional to 85,079.66, 127,637.72 and 25,920.09

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Solution

The fourth proportional to 85,079.66, 127,637.72 and 25,920.09 is: 38,885.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,079.66 : 127,637.72 = 25,920.09 : x
  2. Step 2: Convert to fraction form
    85,079.66/127,637.72 = 25,920.09/x
  3. Step 3: Cross multiply
    85,079.66x = 127,637.72 × 25,920.09
  4. Step 4: Simplify right side
    85,079.66x = 3,308,381,060.19
  5. Step 5: Solve for x
    x = 3,308,381,060.19/85,079.66
  6. Step 6: Final answer
    x = 38,885.69

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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.