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Finding the Fourth Proportional to 75,321.72, 112,915.44 and 28,607.40

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Solution

The fourth proportional to 75,321.72, 112,915.44 and 28,607.40 is: 42,885.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,321.72 : 112,915.44 = 28,607.40 : x
  2. Step 2: Convert to fraction form
    75,321.72/112,915.44 = 28,607.40/x
  3. Step 3: Cross multiply
    75,321.72x = 112,915.44 × 28,607.40
  4. Step 4: Simplify right side
    75,321.72x = 3,230,217,158.26
  5. Step 5: Solve for x
    x = 3,230,217,158.26/75,321.72
  6. Step 6: Final answer
    x = 42,885.60

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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.