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Finding the Fourth Proportional to 124,422, 171,702.36 and 79,710

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Solution

The fourth proportional to 124,422, 171,702.36 and 79,710 is: 109,999.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,422 : 171,702.36 = 79,710 : x
  2. Step 2: Convert to fraction form
    124,422/171,702.36 = 79,710/x
  3. Step 3: Cross multiply
    124,422x = 171,702.36 × 79,710
  4. Step 4: Simplify right side
    124,422x = 13,686,395,115.60
  5. Step 5: Solve for x
    x = 13,686,395,115.60/124,422
  6. Step 6: Final answer
    x = 109,999.80

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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.