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Finding the Fourth Proportional to 128,587.88, 177,410.27 and 83,300.58

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Solution

The fourth proportional to 128,587.88, 177,410.27 and 83,300.58 is: 114,928.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,587.88 : 177,410.27 = 83,300.58 : x
  2. Step 2: Convert to fraction form
    128,587.88/177,410.27 = 83,300.58/x
  3. Step 3: Cross multiply
    128,587.88x = 177,410.27 × 83,300.58
  4. Step 4: Simplify right side
    128,587.88x = 14,778,377,972.45
  5. Step 5: Solve for x
    x = 14,778,377,972.45/128,587.88
  6. Step 6: Final answer
    x = 114,928.24

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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.