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Finding the Fourth Proportional to 208,074.60, 312,111.90 and 187,079.40

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Solution

The fourth proportional to 208,074.60, 312,111.90 and 187,079.40 is: 280,619.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,074.60 : 312,111.90 = 187,079.40 : x
  2. Step 2: Convert to fraction form
    208,074.60/312,111.90 = 187,079.40/x
  3. Step 3: Cross multiply
    208,074.60x = 312,111.90 × 187,079.40
  4. Step 4: Simplify right side
    208,074.60x = 58,389,706,984.86
  5. Step 5: Solve for x
    x = 58,389,706,984.86/208,074.60
  6. Step 6: Final answer
    x = 280,619.10

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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.