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Finding the Fourth Proportional to 124,980.40, 187,470.60 and 72,492.40

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Solution

The fourth proportional to 124,980.40, 187,470.60 and 72,492.40 is: 108,738.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,980.40 : 187,470.60 = 72,492.40 : x
  2. Step 2: Convert to fraction form
    124,980.40/187,470.60 = 72,492.40/x
  3. Step 3: Cross multiply
    124,980.40x = 187,470.60 × 72,492.40
  4. Step 4: Simplify right side
    124,980.40x = 13,590,193,723.44
  5. Step 5: Solve for x
    x = 13,590,193,723.44/124,980.40
  6. Step 6: Final answer
    x = 108,738.60

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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.