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Finding the Fourth Proportional to 128,499.95, 177,385.53 and 96,676.67

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Solution

The fourth proportional to 128,499.95, 177,385.53 and 96,676.67 is: 133,455.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,499.95 : 177,385.53 = 96,676.67 : x
  2. Step 2: Convert to fraction form
    128,499.95/177,385.53 = 96,676.67/x
  3. Step 3: Cross multiply
    128,499.95x = 177,385.53 × 96,676.67
  4. Step 4: Simplify right side
    128,499.95x = 17,149,041,459.66
  5. Step 5: Solve for x
    x = 17,149,041,459.66/128,499.95
  6. Step 6: Final answer
    x = 133,455.63

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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.