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Finding the Fourth Proportional to 208,384.60, 312,116.10 and 125,440.60

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Solution

The fourth proportional to 208,384.60, 312,116.10 and 125,440.60 is: 187,883.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,384.60 : 312,116.10 = 125,440.60 : x
  2. Step 2: Convert to fraction form
    208,384.60/312,116.10 = 125,440.60/x
  3. Step 3: Cross multiply
    208,384.60x = 312,116.10 × 125,440.60
  4. Step 4: Simplify right side
    208,384.60x = 39,152,030,853.66
  5. Step 5: Solve for x
    x = 39,152,030,853.66/208,384.60
  6. Step 6: Final answer
    x = 187,883.51

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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.