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Finding the Fourth Proportional to 128,591.61, 177,459.27 and 73,399.81

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Solution

The fourth proportional to 128,591.61, 177,459.27 and 73,399.81 is: 101,293.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.61 : 177,459.27 = 73,399.81 : x
  2. Step 2: Convert to fraction form
    128,591.61/177,459.27 = 73,399.81/x
  3. Step 3: Cross multiply
    128,591.61x = 177,459.27 × 73,399.81
  4. Step 4: Simplify right side
    128,591.61x = 13,025,476,700.74
  5. Step 5: Solve for x
    x = 13,025,476,700.74/128,591.61
  6. Step 6: Final answer
    x = 101,293.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.