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Finding the Fourth Proportional to 128,320.60, 177,083.56 and 70,963.77

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Solution

The fourth proportional to 128,320.60, 177,083.56 and 70,963.77 is: 97,930.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,320.60 : 177,083.56 = 70,963.77 : x
  2. Step 2: Convert to fraction form
    128,320.60/177,083.56 = 70,963.77/x
  3. Step 3: Cross multiply
    128,320.60x = 177,083.56 × 70,963.77
  4. Step 4: Simplify right side
    128,320.60x = 12,566,517,377.13
  5. Step 5: Solve for x
    x = 12,566,517,377.13/128,320.60
  6. Step 6: Final answer
    x = 97,930.63

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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.