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Finding the Fourth Proportional to 124,985, 172,480.92 and 68,395.16

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Solution

The fourth proportional to 124,985, 172,480.92 and 68,395.16 is: 94,386.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,985 : 172,480.92 = 68,395.16 : x
  2. Step 2: Convert to fraction form
    124,985/172,480.92 = 68,395.16/x
  3. Step 3: Cross multiply
    124,985x = 172,480.92 × 68,395.16
  4. Step 4: Simplify right side
    124,985x = 11,796,860,120.35
  5. Step 5: Solve for x
    x = 11,796,860,120.35/124,985
  6. Step 6: Final answer
    x = 94,386.21

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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.