Home / 128,904.50-177,909.58-75,189.52

Finding the Fourth Proportional to 128,904.50, 177,909.58 and 75,189.52

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Solution

The fourth proportional to 128,904.50, 177,909.58 and 75,189.52 is: 103,774.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,904.50 : 177,909.58 = 75,189.52 : x
  2. Step 2: Convert to fraction form
    128,904.50/177,909.58 = 75,189.52/x
  3. Step 3: Cross multiply
    128,904.50x = 177,909.58 × 75,189.52
  4. Step 4: Simplify right side
    128,904.50x = 13,376,935,290.85
  5. Step 5: Solve for x
    x = 13,376,935,290.85/128,904.50
  6. Step 6: Final answer
    x = 103,774.00

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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.