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Finding the Fourth Proportional to 85,416.44, 128,051.76 and 60,377.72

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Solution

The fourth proportional to 85,416.44, 128,051.76 and 60,377.72 is: 90,515.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,416.44 : 128,051.76 = 60,377.72 : x
  2. Step 2: Convert to fraction form
    85,416.44/128,051.76 = 60,377.72/x
  3. Step 3: Cross multiply
    85,416.44x = 128,051.76 × 60,377.72
  4. Step 4: Simplify right side
    85,416.44x = 7,731,473,447.42
  5. Step 5: Solve for x
    x = 7,731,473,447.42/85,416.44
  6. Step 6: Final answer
    x = 90,515.05

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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.