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Finding the Fourth Proportional to 128,614.88, 177,488.55 and 72,026.26

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Solution

The fourth proportional to 128,614.88, 177,488.55 and 72,026.26 is: 99,396.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,614.88 : 177,488.55 = 72,026.26 : x
  2. Step 2: Convert to fraction form
    128,614.88/177,488.55 = 72,026.26/x
  3. Step 3: Cross multiply
    128,614.88x = 177,488.55 × 72,026.26
  4. Step 4: Simplify right side
    128,614.88x = 12,783,836,275.70
  5. Step 5: Solve for x
    x = 12,783,836,275.70/128,614.88
  6. Step 6: Final answer
    x = 99,396.24

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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.