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Finding the Fourth Proportional to 128,263.84, 191,365.64 and 114,992.80

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Solution

The fourth proportional to 128,263.84, 191,365.64 and 114,992.80 is: 171,565.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,263.84 : 191,365.64 = 114,992.80 : x
  2. Step 2: Convert to fraction form
    128,263.84/191,365.64 = 114,992.80/x
  3. Step 3: Cross multiply
    128,263.84x = 191,365.64 × 114,992.80
  4. Step 4: Simplify right side
    128,263.84x = 22,005,670,767.39
  5. Step 5: Solve for x
    x = 22,005,670,767.39/128,263.84
  6. Step 6: Final answer
    x = 171,565.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.