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Finding the Fourth Proportional to 218,793.10, 302,009.10 and 128,177.98

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Solution

The fourth proportional to 218,793.10, 302,009.10 and 128,177.98 is: 176,929.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,793.10 : 302,009.10 = 128,177.98 : x
  2. Step 2: Convert to fraction form
    218,793.10/302,009.10 = 128,177.98/x
  3. Step 3: Cross multiply
    218,793.10x = 302,009.10 × 128,177.98
  4. Step 4: Simplify right side
    218,793.10x = 38,710,916,379.62
  5. Step 5: Solve for x
    x = 38,710,916,379.62/218,793.10
  6. Step 6: Final answer
    x = 176,929.33

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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.