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Finding the Fourth Proportional to 138,320.64, 207,406.71 and 43,533.09

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Solution

The fourth proportional to 138,320.64, 207,406.71 and 43,533.09 is: 65,276.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,320.64 : 207,406.71 = 43,533.09 : x
  2. Step 2: Convert to fraction form
    138,320.64/207,406.71 = 43,533.09/x
  3. Step 3: Cross multiply
    138,320.64x = 207,406.71 × 43,533.09
  4. Step 4: Simplify right side
    138,320.64x = 9,029,054,973.03
  5. Step 5: Solve for x
    x = 9,029,054,973.03/138,320.64
  6. Step 6: Final answer
    x = 65,276.27

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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.