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Finding the Fourth Proportional to 128,934.84, 177,884.46 and 84,248.76

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Solution

The fourth proportional to 128,934.84, 177,884.46 and 84,248.76 is: 116,233.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,934.84 : 177,884.46 = 84,248.76 : x
  2. Step 2: Convert to fraction form
    128,934.84/177,884.46 = 84,248.76/x
  3. Step 3: Cross multiply
    128,934.84x = 177,884.46 × 84,248.76
  4. Step 4: Simplify right side
    128,934.84x = 14,986,545,178.27
  5. Step 5: Solve for x
    x = 14,986,545,178.27/128,934.84
  6. Step 6: Final answer
    x = 116,233.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.