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Finding the Fourth Proportional to 85,578.64, 118,078.50 and 51,578.08

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Solution

The fourth proportional to 85,578.64, 118,078.50 and 51,578.08 is: 71,165.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,578.64 : 118,078.50 = 51,578.08 : x
  2. Step 2: Convert to fraction form
    85,578.64/118,078.50 = 51,578.08/x
  3. Step 3: Cross multiply
    85,578.64x = 118,078.50 × 51,578.08
  4. Step 4: Simplify right side
    85,578.64x = 6,090,262,319.28
  5. Step 5: Solve for x
    x = 6,090,262,319.28/85,578.64
  6. Step 6: Final answer
    x = 71,165.68

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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.