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Finding the Fourth Proportional to 57,319.05, 85,978.58 and 50,407.05

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Solution

The fourth proportional to 57,319.05, 85,978.58 and 50,407.05 is: 75,610.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,319.05 : 85,978.58 = 50,407.05 : x
  2. Step 2: Convert to fraction form
    57,319.05/85,978.58 = 50,407.05/x
  3. Step 3: Cross multiply
    57,319.05x = 85,978.58 × 50,407.05
  4. Step 4: Simplify right side
    57,319.05x = 4,333,926,328.95
  5. Step 5: Solve for x
    x = 4,333,926,328.95/57,319.05
  6. Step 6: Final answer
    x = 75,610.58

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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.