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Finding the Fourth Proportional to 124,959.60, 187,212.60 and 72,212.40

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Solution

The fourth proportional to 124,959.60, 187,212.60 and 72,212.40 is: 108,187.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,959.60 : 187,212.60 = 72,212.40 : x
  2. Step 2: Convert to fraction form
    124,959.60/187,212.60 = 72,212.40/x
  3. Step 3: Cross multiply
    124,959.60x = 187,212.60 × 72,212.40
  4. Step 4: Simplify right side
    124,959.60x = 13,519,071,156.24
  5. Step 5: Solve for x
    x = 13,519,071,156.24/124,959.60
  6. Step 6: Final answer
    x = 108,187.54

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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.