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Finding the Fourth Proportional to 129,644.01, 178,908.48 and 70,028.01

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Solution

The fourth proportional to 129,644.01, 178,908.48 and 70,028.01 is: 96,638.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,644.01 : 178,908.48 = 70,028.01 : x
  2. Step 2: Convert to fraction form
    129,644.01/178,908.48 = 70,028.01/x
  3. Step 3: Cross multiply
    129,644.01x = 178,908.48 × 70,028.01
  4. Step 4: Simplify right side
    129,644.01x = 12,528,604,826.52
  5. Step 5: Solve for x
    x = 12,528,604,826.52/129,644.01
  6. Step 6: Final answer
    x = 96,638.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.