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Finding the Fourth Proportional to 128,641.20, 177,465.29 and 83,334.12

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Solution

The fourth proportional to 128,641.20, 177,465.29 and 83,334.12 is: 114,962.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,641.20 : 177,465.29 = 83,334.12 : x
  2. Step 2: Convert to fraction form
    128,641.20/177,465.29 = 83,334.12/x
  3. Step 3: Cross multiply
    128,641.20x = 177,465.29 × 83,334.12
  4. Step 4: Simplify right side
    128,641.20x = 14,788,913,772.69
  5. Step 5: Solve for x
    x = 14,788,913,772.69/128,641.20
  6. Step 6: Final answer
    x = 114,962.50

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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.