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Finding the Fourth Proportional to 54,690.60, 81,971.10 and 49,117.80

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Solution

The fourth proportional to 54,690.60, 81,971.10 and 49,117.80 is: 73,618.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,690.60 : 81,971.10 = 49,117.80 : x
  2. Step 2: Convert to fraction form
    54,690.60/81,971.10 = 49,117.80/x
  3. Step 3: Cross multiply
    54,690.60x = 81,971.10 × 49,117.80
  4. Step 4: Simplify right side
    54,690.60x = 4,026,240,095.58
  5. Step 5: Solve for x
    x = 4,026,240,095.58/54,690.60
  6. Step 6: Final answer
    x = 73,618.50

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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.