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Finding the Fourth Proportional to 134,575.50, 185,714.19 and 78,019.68

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Solution

The fourth proportional to 134,575.50, 185,714.19 and 78,019.68 is: 107,667.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,575.50 : 185,714.19 = 78,019.68 : x
  2. Step 2: Convert to fraction form
    134,575.50/185,714.19 = 78,019.68/x
  3. Step 3: Cross multiply
    134,575.50x = 185,714.19 × 78,019.68
  4. Step 4: Simplify right side
    134,575.50x = 14,489,361,675.26
  5. Step 5: Solve for x
    x = 14,489,361,675.26/134,575.50
  6. Step 6: Final answer
    x = 107,667.16

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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.