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Finding the Fourth Proportional to 57,000.45, 79,931.85 and 57,000.45

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Solution

The fourth proportional to 57,000.45, 79,931.85 and 57,000.45 is: 79,931.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,000.45 : 79,931.85 = 57,000.45 : x
  2. Step 2: Convert to fraction form
    57,000.45/79,931.85 = 57,000.45/x
  3. Step 3: Cross multiply
    57,000.45x = 79,931.85 × 57,000.45
  4. Step 4: Simplify right side
    57,000.45x = 4,556,151,419.33
  5. Step 5: Solve for x
    x = 4,556,151,419.33/57,000.45
  6. Step 6: Final answer
    x = 79,931.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.