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Finding the Fourth Proportional to 102,040.80, 140,815.52 and 57,328.80

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Solution

The fourth proportional to 102,040.80, 140,815.52 and 57,328.80 is: 79,113.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,040.80 : 140,815.52 = 57,328.80 : x
  2. Step 2: Convert to fraction form
    102,040.80/140,815.52 = 57,328.80/x
  3. Step 3: Cross multiply
    102,040.80x = 140,815.52 × 57,328.80
  4. Step 4: Simplify right side
    102,040.80x = 8,072,784,782.98
  5. Step 5: Solve for x
    x = 8,072,784,782.98/102,040.80
  6. Step 6: Final answer
    x = 79,113.30

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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.