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Finding the Fourth Proportional to 128,782.44, 177,726.76 and 75,064.25

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Solution

The fourth proportional to 128,782.44, 177,726.76 and 75,064.25 is: 103,592.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,782.44 : 177,726.76 = 75,064.25 : x
  2. Step 2: Convert to fraction form
    128,782.44/177,726.76 = 75,064.25/x
  3. Step 3: Cross multiply
    128,782.44x = 177,726.76 × 75,064.25
  4. Step 4: Simplify right side
    128,782.44x = 13,340,926,200.99
  5. Step 5: Solve for x
    x = 13,340,926,200.99/128,782.44
  6. Step 6: Final answer
    x = 103,592.74

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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.