Home / 124,728.54-172,182.12-79,468.57

Finding the Fourth Proportional to 124,728.54, 172,182.12 and 79,468.57

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Solution

The fourth proportional to 124,728.54, 172,182.12 and 79,468.57 is: 109,702.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,728.54 : 172,182.12 = 79,468.57 : x
  2. Step 2: Convert to fraction form
    124,728.54/172,182.12 = 79,468.57/x
  3. Step 3: Cross multiply
    124,728.54x = 172,182.12 × 79,468.57
  4. Step 4: Simplify right side
    124,728.54x = 13,683,066,855.97
  5. Step 5: Solve for x
    x = 13,683,066,855.97/124,728.54
  6. Step 6: Final answer
    x = 109,702.77

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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.