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Finding the Fourth Proportional to 287,136.60, 430,704.90 and 73,904.10

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Solution

The fourth proportional to 287,136.60, 430,704.90 and 73,904.10 is: 110,856.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,136.60 : 430,704.90 = 73,904.10 : x
  2. Step 2: Convert to fraction form
    287,136.60/430,704.90 = 73,904.10/x
  3. Step 3: Cross multiply
    287,136.60x = 430,704.90 × 73,904.10
  4. Step 4: Simplify right side
    287,136.60x = 31,830,858,000.09
  5. Step 5: Solve for x
    x = 31,830,858,000.09/287,136.60
  6. Step 6: Final answer
    x = 110,856.15

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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.