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Finding the Fourth Proportional to 121,580.40, 182,485.80 and 74,924.40

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Solution

The fourth proportional to 121,580.40, 182,485.80 and 74,924.40 is: 112,457.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,580.40 : 182,485.80 = 74,924.40 : x
  2. Step 2: Convert to fraction form
    121,580.40/182,485.80 = 74,924.40/x
  3. Step 3: Cross multiply
    121,580.40x = 182,485.80 × 74,924.40
  4. Step 4: Simplify right side
    121,580.40x = 13,672,639,073.52
  5. Step 5: Solve for x
    x = 13,672,639,073.52/121,580.40
  6. Step 6: Final answer
    x = 112,457.59

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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.