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Finding the Fourth Proportional to 128,846.29, 177,807.54 and 72,258.88

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Solution

The fourth proportional to 128,846.29, 177,807.54 and 72,258.88 is: 99,717.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,846.29 : 177,807.54 = 72,258.88 : x
  2. Step 2: Convert to fraction form
    128,846.29/177,807.54 = 72,258.88/x
  3. Step 3: Cross multiply
    128,846.29x = 177,807.54 × 72,258.88
  4. Step 4: Simplify right side
    128,846.29x = 12,848,173,695.96
  5. Step 5: Solve for x
    x = 12,848,173,695.96/128,846.29
  6. Step 6: Final answer
    x = 99,717.06

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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.