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Finding the Fourth Proportional to 137,887.45, 206,875.74 and 67,717.55

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Solution

The fourth proportional to 137,887.45, 206,875.74 and 67,717.55 is: 101,598.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,887.45 : 206,875.74 = 67,717.55 : x
  2. Step 2: Convert to fraction form
    137,887.45/206,875.74 = 67,717.55/x
  3. Step 3: Cross multiply
    137,887.45x = 206,875.74 × 67,717.55
  4. Step 4: Simplify right side
    137,887.45x = 14,009,118,267.24
  5. Step 5: Solve for x
    x = 14,009,118,267.24/137,887.45
  6. Step 6: Final answer
    x = 101,598.21

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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.