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Finding the Fourth Proportional to 115,320, 159,141.60 and 62,328

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Solution

The fourth proportional to 115,320, 159,141.60 and 62,328 is: 86,012.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,320 : 159,141.60 = 62,328 : x
  2. Step 2: Convert to fraction form
    115,320/159,141.60 = 62,328/x
  3. Step 3: Cross multiply
    115,320x = 159,141.60 × 62,328
  4. Step 4: Simplify right side
    115,320x = 9,918,977,644.80
  5. Step 5: Solve for x
    x = 9,918,977,644.80/115,320
  6. Step 6: Final answer
    x = 86,012.64

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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.