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Finding the Fourth Proportional to 128,955.40, 192,489.96 and 119,457.33

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Solution

The fourth proportional to 128,955.40, 192,489.96 and 119,457.33 is: 178,312.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,955.40 : 192,489.96 = 119,457.33 : x
  2. Step 2: Convert to fraction form
    128,955.40/192,489.96 = 119,457.33/x
  3. Step 3: Cross multiply
    128,955.40x = 192,489.96 × 119,457.33
  4. Step 4: Simplify right side
    128,955.40x = 22,994,336,673.41
  5. Step 5: Solve for x
    x = 22,994,336,673.41/128,955.40
  6. Step 6: Final answer
    x = 178,312.32

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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.