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Finding the Fourth Proportional to 121,973.60, 182,960.40 and 72,077.60

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Solution

The fourth proportional to 121,973.60, 182,960.40 and 72,077.60 is: 108,116.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,973.60 : 182,960.40 = 72,077.60 : x
  2. Step 2: Convert to fraction form
    121,973.60/182,960.40 = 72,077.60/x
  3. Step 3: Cross multiply
    121,973.60x = 182,960.40 × 72,077.60
  4. Step 4: Simplify right side
    121,973.60x = 13,187,346,527.04
  5. Step 5: Solve for x
    x = 13,187,346,527.04/121,973.60
  6. Step 6: Final answer
    x = 108,116.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.