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Finding the Fourth Proportional to 121,592.40, 182,503.80 and 74,936.40

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Solution

The fourth proportional to 121,592.40, 182,503.80 and 74,936.40 is: 112,475.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,592.40 : 182,503.80 = 74,936.40 : x
  2. Step 2: Convert to fraction form
    121,592.40/182,503.80 = 74,936.40/x
  3. Step 3: Cross multiply
    121,592.40x = 182,503.80 × 74,936.40
  4. Step 4: Simplify right side
    121,592.40x = 13,676,177,758.32
  5. Step 5: Solve for x
    x = 13,676,177,758.32/121,592.40
  6. Step 6: Final answer
    x = 112,475.60

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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.