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Finding the Fourth Proportional to 85,962.88, 128,984 and 39,230.08

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Solution

The fourth proportional to 85,962.88, 128,984 and 39,230.08 is: 58,863.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,962.88 : 128,984 = 39,230.08 : x
  2. Step 2: Convert to fraction form
    85,962.88/128,984 = 39,230.08/x
  3. Step 3: Cross multiply
    85,962.88x = 128,984 × 39,230.08
  4. Step 4: Simplify right side
    85,962.88x = 5,060,052,638.72
  5. Step 5: Solve for x
    x = 5,060,052,638.72/85,962.88
  6. Step 6: Final answer
    x = 58,863.23

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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.