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Finding the Fourth Proportional to 127,428.52, 175,830.66 and 70,838.44

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Solution

The fourth proportional to 127,428.52, 175,830.66 and 70,838.44 is: 97,745.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,428.52 : 175,830.66 = 70,838.44 : x
  2. Step 2: Convert to fraction form
    127,428.52/175,830.66 = 70,838.44/x
  3. Step 3: Cross multiply
    127,428.52x = 175,830.66 × 70,838.44
  4. Step 4: Simplify right side
    127,428.52x = 12,455,569,658.57
  5. Step 5: Solve for x
    x = 12,455,569,658.57/127,428.52
  6. Step 6: Final answer
    x = 97,745.54

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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.