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Finding the Fourth Proportional to 205,078.60, 307,617.90 and 64,880.20

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Solution

The fourth proportional to 205,078.60, 307,617.90 and 64,880.20 is: 97,320.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,078.60 : 307,617.90 = 64,880.20 : x
  2. Step 2: Convert to fraction form
    205,078.60/307,617.90 = 64,880.20/x
  3. Step 3: Cross multiply
    205,078.60x = 307,617.90 × 64,880.20
  4. Step 4: Simplify right side
    205,078.60x = 19,958,310,875.58
  5. Step 5: Solve for x
    x = 19,958,310,875.58/205,078.60
  6. Step 6: Final answer
    x = 97,320.30

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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.