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Finding the Fourth Proportional to 85,939.83, 128,915.97 and 35,969.67

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Solution

The fourth proportional to 85,939.83, 128,915.97 and 35,969.67 is: 53,957.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,939.83 : 128,915.97 = 35,969.67 : x
  2. Step 2: Convert to fraction form
    85,939.83/128,915.97 = 35,969.67/x
  3. Step 3: Cross multiply
    85,939.83x = 128,915.97 × 35,969.67
  4. Step 4: Simplify right side
    85,939.83x = 4,637,064,898.63
  5. Step 5: Solve for x
    x = 4,637,064,898.63/85,939.83
  6. Step 6: Final answer
    x = 53,957.11

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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.