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Finding the Fourth Proportional to 138,124.20, 207,106.92 and 67,022.40

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Solution

The fourth proportional to 138,124.20, 207,106.92 and 67,022.40 is: 100,495.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,124.20 : 207,106.92 = 67,022.40 : x
  2. Step 2: Convert to fraction form
    138,124.20/207,106.92 = 67,022.40/x
  3. Step 3: Cross multiply
    138,124.20x = 207,106.92 × 67,022.40
  4. Step 4: Simplify right side
    138,124.20x = 13,880,802,835.01
  5. Step 5: Solve for x
    x = 13,880,802,835.01/138,124.20
  6. Step 6: Final answer
    x = 100,495.08

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1.5x scale

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.