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Finding the Fourth Proportional to 128,341.36, 191,232.86 and 114,374.80

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Solution

The fourth proportional to 128,341.36, 191,232.86 and 114,374.80 is: 170,422.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,341.36 : 191,232.86 = 114,374.80 : x
  2. Step 2: Convert to fraction form
    128,341.36/191,232.86 = 114,374.80/x
  3. Step 3: Cross multiply
    128,341.36x = 191,232.86 × 114,374.80
  4. Step 4: Simplify right side
    128,341.36x = 21,872,220,115.93
  5. Step 5: Solve for x
    x = 21,872,220,115.93/128,341.36
  6. Step 6: Final answer
    x = 170,422.22

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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.