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Finding the Fourth Proportional to 127,925.80, 191,888.70 and 81,039.40

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Solution

The fourth proportional to 127,925.80, 191,888.70 and 81,039.40 is: 121,559.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,925.80 : 191,888.70 = 81,039.40 : x
  2. Step 2: Convert to fraction form
    127,925.80/191,888.70 = 81,039.40/x
  3. Step 3: Cross multiply
    127,925.80x = 191,888.70 × 81,039.40
  4. Step 4: Simplify right side
    127,925.80x = 15,550,545,114.78
  5. Step 5: Solve for x
    x = 15,550,545,114.78/127,925.80
  6. Step 6: Final answer
    x = 121,559.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.