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Finding the Fourth Proportional to 77,287.72, 106,656.90 and 43,756.84

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Solution

The fourth proportional to 77,287.72, 106,656.90 and 43,756.84 is: 60,384.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,287.72 : 106,656.90 = 43,756.84 : x
  2. Step 2: Convert to fraction form
    77,287.72/106,656.90 = 43,756.84/x
  3. Step 3: Cross multiply
    77,287.72x = 106,656.90 × 43,756.84
  4. Step 4: Simplify right side
    77,287.72x = 4,666,968,908.20
  5. Step 5: Solve for x
    x = 4,666,968,908.20/77,287.72
  6. Step 6: Final answer
    x = 60,384.35

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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.