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Finding the Fourth Proportional to 208,515.20, 312,740.40 and 58,740.80

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Solution

The fourth proportional to 208,515.20, 312,740.40 and 58,740.80 is: 88,102.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,515.20 : 312,740.40 = 58,740.80 : x
  2. Step 2: Convert to fraction form
    208,515.20/312,740.40 = 58,740.80/x
  3. Step 3: Cross multiply
    208,515.20x = 312,740.40 × 58,740.80
  4. Step 4: Simplify right side
    208,515.20x = 18,370,621,288.32
  5. Step 5: Solve for x
    x = 18,370,621,288.32/208,515.20
  6. Step 6: Final answer
    x = 88,102.07

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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.