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Finding the Fourth Proportional to 208,116.60, 312,143.22 and 67,875

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Solution

The fourth proportional to 208,116.60, 312,143.22 and 67,875 is: 101,802.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,116.60 : 312,143.22 = 67,875 : x
  2. Step 2: Convert to fraction form
    208,116.60/312,143.22 = 67,875/x
  3. Step 3: Cross multiply
    208,116.60x = 312,143.22 × 67,875
  4. Step 4: Simplify right side
    208,116.60x = 21,186,721,057.50
  5. Step 5: Solve for x
    x = 21,186,721,057.50/208,116.60
  6. Step 6: Final answer
    x = 101,802.17

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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.