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Finding the Fourth Proportional to 85,871.68, 128,823.36 and 26,703.52

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Solution

The fourth proportional to 85,871.68, 128,823.36 and 26,703.52 is: 40,060.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,871.68 : 128,823.36 = 26,703.52 : x
  2. Step 2: Convert to fraction form
    85,871.68/128,823.36 = 26,703.52/x
  3. Step 3: Cross multiply
    85,871.68x = 128,823.36 × 26,703.52
  4. Step 4: Simplify right side
    85,871.68x = 3,440,037,170.23
  5. Step 5: Solve for x
    x = 3,440,037,170.23/85,871.68
  6. Step 6: Final answer
    x = 40,060.21

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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.