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Finding the Fourth Proportional to 138,426.80, 207,510.60 and 108,424.40

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Solution

The fourth proportional to 138,426.80, 207,510.60 and 108,424.40 is: 162,535.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,426.80 : 207,510.60 = 108,424.40 : x
  2. Step 2: Convert to fraction form
    138,426.80/207,510.60 = 108,424.40/x
  3. Step 3: Cross multiply
    138,426.80x = 207,510.60 × 108,424.40
  4. Step 4: Simplify right side
    138,426.80x = 22,499,212,298.64
  5. Step 5: Solve for x
    x = 22,499,212,298.64/138,426.80
  6. Step 6: Final answer
    x = 162,535.09

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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.