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Finding the Fourth Proportional to 55,802.16, 76,927.32 and 39,880.80

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Solution

The fourth proportional to 55,802.16, 76,927.32 and 39,880.80 is: 54,978.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,802.16 : 76,927.32 = 39,880.80 : x
  2. Step 2: Convert to fraction form
    55,802.16/76,927.32 = 39,880.80/x
  3. Step 3: Cross multiply
    55,802.16x = 76,927.32 × 39,880.80
  4. Step 4: Simplify right side
    55,802.16x = 3,067,923,063.46
  5. Step 5: Solve for x
    x = 3,067,923,063.46/55,802.16
  6. Step 6: Final answer
    x = 54,978.57

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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.