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Finding the Fourth Proportional to 85,404.30, 128,125.65 and 50,325.90

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Solution

The fourth proportional to 85,404.30, 128,125.65 and 50,325.90 is: 75,500.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,404.30 : 128,125.65 = 50,325.90 : x
  2. Step 2: Convert to fraction form
    85,404.30/128,125.65 = 50,325.90/x
  3. Step 3: Cross multiply
    85,404.30x = 128,125.65 × 50,325.90
  4. Step 4: Simplify right side
    85,404.30x = 6,448,038,649.34
  5. Step 5: Solve for x
    x = 6,448,038,649.34/85,404.30
  6. Step 6: Final answer
    x = 75,500.16

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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.