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Finding the Fourth Proportional to 128,144.64, 191,838.42 and 94,642.20

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Solution

The fourth proportional to 128,144.64, 191,838.42 and 94,642.20 is: 141,683.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.64 : 191,838.42 = 94,642.20 : x
  2. Step 2: Convert to fraction form
    128,144.64/191,838.42 = 94,642.20/x
  3. Step 3: Cross multiply
    128,144.64x = 191,838.42 × 94,642.20
  4. Step 4: Simplify right side
    128,144.64x = 18,156,010,113.32
  5. Step 5: Solve for x
    x = 18,156,010,113.32/128,144.64
  6. Step 6: Final answer
    x = 141,683.73

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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.