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Finding the Fourth Proportional to 128,614.52, 177,459.48 and 77,635.64

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Solution

The fourth proportional to 128,614.52, 177,459.48 and 77,635.64 is: 107,119.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,614.52 : 177,459.48 = 77,635.64 : x
  2. Step 2: Convert to fraction form
    128,614.52/177,459.48 = 77,635.64/x
  3. Step 3: Cross multiply
    128,614.52x = 177,459.48 × 77,635.64
  4. Step 4: Simplify right side
    128,614.52x = 13,777,180,303.87
  5. Step 5: Solve for x
    x = 13,777,180,303.87/128,614.52
  6. Step 6: Final answer
    x = 107,119.94

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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.