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Finding the Fourth Proportional to 77,886.45, 107,485.52 and 43,431.97

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Solution

The fourth proportional to 77,886.45, 107,485.52 and 43,431.97 is: 59,937.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,886.45 : 107,485.52 = 43,431.97 : x
  2. Step 2: Convert to fraction form
    77,886.45/107,485.52 = 43,431.97/x
  3. Step 3: Cross multiply
    77,886.45x = 107,485.52 × 43,431.97
  4. Step 4: Simplify right side
    77,886.45x = 4,668,307,880.07
  5. Step 5: Solve for x
    x = 4,668,307,880.07/77,886.45
  6. Step 6: Final answer
    x = 59,937.36

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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.