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Finding the Fourth Proportional to 128,144.64, 191,838.45 and 94,642.23

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Solution

The fourth proportional to 128,144.64, 191,838.45 and 94,642.23 is: 141,683.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.64 : 191,838.45 = 94,642.23 : x
  2. Step 2: Convert to fraction form
    128,144.64/191,838.45 = 94,642.23/x
  3. Step 3: Cross multiply
    128,144.64x = 191,838.45 × 94,642.23
  4. Step 4: Simplify right side
    128,144.64x = 18,156,018,707.74
  5. Step 5: Solve for x
    x = 18,156,018,707.74/128,144.64
  6. Step 6: Final answer
    x = 141,683.79

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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.