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Finding the Fourth Proportional to 85,859.56, 128,767.47 and 26,664.76

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Solution

The fourth proportional to 85,859.56, 128,767.47 and 26,664.76 is: 39,990.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,859.56 : 128,767.47 = 26,664.76 : x
  2. Step 2: Convert to fraction form
    85,859.56/128,767.47 = 26,664.76/x
  3. Step 3: Cross multiply
    85,859.56x = 128,767.47 × 26,664.76
  4. Step 4: Simplify right side
    85,859.56x = 3,433,553,683.36
  5. Step 5: Solve for x
    x = 3,433,553,683.36/85,859.56
  6. Step 6: Final answer
    x = 39,990.35

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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.