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Finding the Fourth Proportional to 125,078.63, 172,635.30 and 79,746.17

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Solution

The fourth proportional to 125,078.63, 172,635.30 and 79,746.17 is: 110,066.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,078.63 : 172,635.30 = 79,746.17 : x
  2. Step 2: Convert to fraction form
    125,078.63/172,635.30 = 79,746.17/x
  3. Step 3: Cross multiply
    125,078.63x = 172,635.30 × 79,746.17
  4. Step 4: Simplify right side
    125,078.63x = 13,767,003,118.62
  5. Step 5: Solve for x
    x = 13,767,003,118.62/125,078.63
  6. Step 6: Final answer
    x = 110,066.79

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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.