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Finding the Fourth Proportional to 77,980.72, 107,612.06 and 43,989.28

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Solution

The fourth proportional to 77,980.72, 107,612.06 and 43,989.28 is: 60,704.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,980.72 : 107,612.06 = 43,989.28 : x
  2. Step 2: Convert to fraction form
    77,980.72/107,612.06 = 43,989.28/x
  3. Step 3: Cross multiply
    77,980.72x = 107,612.06 × 43,989.28
  4. Step 4: Simplify right side
    77,980.72x = 4,733,777,038.72
  5. Step 5: Solve for x
    x = 4,733,777,038.72/77,980.72
  6. Step 6: Final answer
    x = 60,704.45

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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.