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Finding the Fourth Proportional to 121,518.80, 182,623.80 and 106,312.40

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Solution

The fourth proportional to 121,518.80, 182,623.80 and 106,312.40 is: 159,770.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,518.80 : 182,623.80 = 106,312.40 : x
  2. Step 2: Convert to fraction form
    121,518.80/182,623.80 = 106,312.40/x
  3. Step 3: Cross multiply
    121,518.80x = 182,623.80 × 106,312.40
  4. Step 4: Simplify right side
    121,518.80x = 19,415,174,475.12
  5. Step 5: Solve for x
    x = 19,415,174,475.12/121,518.80
  6. Step 6: Final answer
    x = 159,770.95

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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.