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Finding the Fourth Proportional to 61,135.20, 85,647.60 and 61,135.20

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Solution

The fourth proportional to 61,135.20, 85,647.60 and 61,135.20 is: 85,647.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,135.20 : 85,647.60 = 61,135.20 : x
  2. Step 2: Convert to fraction form
    61,135.20/85,647.60 = 61,135.20/x
  3. Step 3: Cross multiply
    61,135.20x = 85,647.60 × 61,135.20
  4. Step 4: Simplify right side
    61,135.20x = 5,236,083,155.52
  5. Step 5: Solve for x
    x = 5,236,083,155.52/61,135.20
  6. Step 6: Final answer
    x = 85,647.60

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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.