Home / 85,931.10-128,871.86-29,768.94

Finding the Fourth Proportional to 85,931.10, 128,871.86 and 29,768.94

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Solution

The fourth proportional to 85,931.10, 128,871.86 and 29,768.94 is: 44,644.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,931.10 : 128,871.86 = 29,768.94 : x
  2. Step 2: Convert to fraction form
    85,931.10/128,871.86 = 29,768.94/x
  3. Step 3: Cross multiply
    85,931.10x = 128,871.86 × 29,768.94
  4. Step 4: Simplify right side
    85,931.10x = 3,836,378,668.03
  5. Step 5: Solve for x
    x = 3,836,378,668.03/85,931.10
  6. Step 6: Final answer
    x = 44,644.82

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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.