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Finding the Fourth Proportional to 128,666.10, 193,006.71 and 49,780.74

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Solution

The fourth proportional to 128,666.10, 193,006.71 and 49,780.74 is: 74,674.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,666.10 : 193,006.71 = 49,780.74 : x
  2. Step 2: Convert to fraction form
    128,666.10/193,006.71 = 49,780.74/x
  3. Step 3: Cross multiply
    128,666.10x = 193,006.71 × 49,780.74
  4. Step 4: Simplify right side
    128,666.10x = 9,608,016,848.77
  5. Step 5: Solve for x
    x = 9,608,016,848.77/128,666.10
  6. Step 6: Final answer
    x = 74,674.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.