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Finding the Fourth Proportional to 124,991.88, 172,488.04 and 71,275.74

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Solution

The fourth proportional to 124,991.88, 172,488.04 and 71,275.74 is: 98,360.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,991.88 : 172,488.04 = 71,275.74 : x
  2. Step 2: Convert to fraction form
    124,991.88/172,488.04 = 71,275.74/x
  3. Step 3: Cross multiply
    124,991.88x = 172,488.04 × 71,275.74
  4. Step 4: Simplify right side
    124,991.88x = 12,294,212,692.15
  5. Step 5: Solve for x
    x = 12,294,212,692.15/124,991.88
  6. Step 6: Final answer
    x = 98,360.09

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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.