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Finding the Fourth Proportional to 255,341.12, 383,012.08 and 105,416.86

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Solution

The fourth proportional to 255,341.12, 383,012.08 and 105,416.86 is: 158,125.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,341.12 : 383,012.08 = 105,416.86 : x
  2. Step 2: Convert to fraction form
    255,341.12/383,012.08 = 105,416.86/x
  3. Step 3: Cross multiply
    255,341.12x = 383,012.08 × 105,416.86
  4. Step 4: Simplify right side
    255,341.12x = 40,375,930,815.67
  5. Step 5: Solve for x
    x = 40,375,930,815.67/255,341.12
  6. Step 6: Final answer
    x = 158,125.46

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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.