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Finding the Fourth Proportional to 286,611.12, 429,916.02 and 76,249.05

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Solution

The fourth proportional to 286,611.12, 429,916.02 and 76,249.05 is: 114,373.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,611.12 : 429,916.02 = 76,249.05 : x
  2. Step 2: Convert to fraction form
    286,611.12/429,916.02 = 76,249.05/x
  3. Step 3: Cross multiply
    286,611.12x = 429,916.02 × 76,249.05
  4. Step 4: Simplify right side
    286,611.12x = 32,780,688,104.78
  5. Step 5: Solve for x
    x = 32,780,688,104.78/286,611.12
  6. Step 6: Final answer
    x = 114,373.40

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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.