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Finding the Fourth Proportional to 128,160.50, 176,851.53 and 74,436.74

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Solution

The fourth proportional to 128,160.50, 176,851.53 and 74,436.74 is: 102,716.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,160.50 : 176,851.53 = 74,436.74 : x
  2. Step 2: Convert to fraction form
    128,160.50/176,851.53 = 74,436.74/x
  3. Step 3: Cross multiply
    128,160.50x = 176,851.53 × 74,436.74
  4. Step 4: Simplify right side
    128,160.50x = 13,164,251,357.21
  5. Step 5: Solve for x
    x = 13,164,251,357.21/128,160.50
  6. Step 6: Final answer
    x = 102,716.92

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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.