Home / 85,941.12-128,915.13-40,939.34

Finding the Fourth Proportional to 85,941.12, 128,915.13 and 40,939.34

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Solution

The fourth proportional to 85,941.12, 128,915.13 and 40,939.34 is: 61,410.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,941.12 : 128,915.13 = 40,939.34 : x
  2. Step 2: Convert to fraction form
    85,941.12/128,915.13 = 40,939.34/x
  3. Step 3: Cross multiply
    85,941.12x = 128,915.13 × 40,939.34
  4. Step 4: Simplify right side
    85,941.12x = 5,277,700,660.50
  5. Step 5: Solve for x
    x = 5,277,700,660.50/85,941.12
  6. Step 6: Final answer
    x = 61,410.66

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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.