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Finding the Fourth Proportional to 102,879.90, 141,980.85 and 57,563.10

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Solution

The fourth proportional to 102,879.90, 141,980.85 and 57,563.10 is: 79,440.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,879.90 : 141,980.85 = 57,563.10 : x
  2. Step 2: Convert to fraction form
    102,879.90/141,980.85 = 57,563.10/x
  3. Step 3: Cross multiply
    102,879.90x = 141,980.85 × 57,563.10
  4. Step 4: Simplify right side
    102,879.90x = 8,172,857,866.64
  5. Step 5: Solve for x
    x = 8,172,857,866.64/102,879.90
  6. Step 6: Final answer
    x = 79,440.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.