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Finding the Fourth Proportional to 145,809.76, 218,636.88 and 75,514.72

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Solution

The fourth proportional to 145,809.76, 218,636.88 and 75,514.72 is: 113,231.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,809.76 : 218,636.88 = 75,514.72 : x
  2. Step 2: Convert to fraction form
    145,809.76/218,636.88 = 75,514.72/x
  3. Step 3: Cross multiply
    145,809.76x = 218,636.88 × 75,514.72
  4. Step 4: Simplify right side
    145,809.76x = 16,510,302,774.87
  5. Step 5: Solve for x
    x = 16,510,302,774.87/145,809.76
  6. Step 6: Final answer
    x = 113,231.81

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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.