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Finding the Fourth Proportional to 86,578.60, 129,867.90 and 49,612.20

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Solution

The fourth proportional to 86,578.60, 129,867.90 and 49,612.20 is: 74,418.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,578.60 : 129,867.90 = 49,612.20 : x
  2. Step 2: Convert to fraction form
    86,578.60/129,867.90 = 49,612.20/x
  3. Step 3: Cross multiply
    86,578.60x = 129,867.90 × 49,612.20
  4. Step 4: Simplify right side
    86,578.60x = 6,443,032,228.38
  5. Step 5: Solve for x
    x = 6,443,032,228.38/86,578.60
  6. Step 6: Final answer
    x = 74,418.30

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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.