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Finding the Fourth Proportional to 124,201.08, 171,597.90 and 86,643

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Solution

The fourth proportional to 124,201.08, 171,597.90 and 86,643 is: 119,707.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,201.08 : 171,597.90 = 86,643 : x
  2. Step 2: Convert to fraction form
    124,201.08/171,597.90 = 86,643/x
  3. Step 3: Cross multiply
    124,201.08x = 171,597.90 × 86,643
  4. Step 4: Simplify right side
    124,201.08x = 14,867,756,849.70
  5. Step 5: Solve for x
    x = 14,867,756,849.70/124,201.08
  6. Step 6: Final answer
    x = 119,707.15

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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.